Last week we told you about the launch of the Galaxy Tab 7.7. After being on display for less than 2 days, Samsung removed every trace of their existence from the booth. A PR spokesman at the booth had little to say.

Dusseldorf is where Apple is suing Samsung to stop sales of the 7.7's big brother, the Galaxy Tab 10.1, claiming that Samsung copied the design iPad 2.

On Aug. 25, the a Dusseldorf court upheld a preliminary injunction ordering Samsung to stop selling the Galaxy Tab 10.1 in Germany. Samsung's lawyers must have anticipated the possibility that the court's ruling would apply to the smaller tablet too.

Samsung covered up the signage for the tablet. You can see here in the before and after images. In this image a backlit sign for the Galaxy Tab 7.7 is visible, but by Sunday it was replaced with an advertisement for the Note.

On one of the walls at the booth it looked as if a piece of text was slapped over what previously advertised the Tab 7.7. And you can see in this video that the graphic shot on Friday is different from the one displayed on Sunday.

Removing the tablet from the stands means tens of thousands of consumers and press didn’t get a chance to try it out.

But the bad news doesn’t stop there for the Korean electronics maker. Reviews are starting to roll in for the Galaxy Note, the 5.3-inch tablet-smartphone hybrid. Many seem to be scratching their heads about the size and the stylus that it uses

Sony’s taken a different approach to 3D and is planning to offer consumers the Personal 3D Viewer as an alternative to 3D televisions. It’ll be out by the end of the year, though Sony didn’t provide pricing details.

Yoshinori Matsumoto, General Manger, Home Entertainment, Sony: "We can provide with this gadget in your home that home theater experience. That means a 750 inch screen at a 20 meter distance in your home. So thanks to our OLED technology—that means organic light emitting diode—that can provide a very clear picture that you haven’t experienced yet."

It can be connected to a 3D camcorder for a live view of what’s being shot or used for movies and gaming. It also has headphones. While the 3D viewer may be isolating, it’s not like you can enjoy it with your friends, I had a chance to try it and it’s pretty unique. The 3D effect is quite good and the picture is clear and bright. It takes a moment to focus the glasses, but after that it can just sit comfortably on your head.

Staying with 3D, LG debuted its Dual Play technology here, hoping that it will entice gamers into buying 3D Tvs.

Normally in multiplayer games, the screen is split, but with dual play gamers can view the full screen with each player seeing a separate image. 3D TVs work by sending different images to each eye and Dual Play uses that to its advantage by sending one set of images to one player and another set with another player. Where typical polarized 3D glasses would have a left and right eye, the dual play glasses have one set with 2 left eyes and another set with 2 right eyes.

And even though the TV supports 3D in dual play games are shown in traditional 2D.

Dual Play works with any LG cinema 3D TV and the glasses will begin shipping along with LW980 series television by the end of September. LG also said that users could make their own Dual Play glasses simply by switching out lenses.

Sony announced a similar idea at E3 back in June, but that TV uses active shutter 3D glasses and measures only 24-inches.

Panasonic is also betting big on 3D and is focusing a lot on content. It announced a deal to broadcast the 2012 London Olympic games live in 3D. It will use the AG-3DP1. Panasonic, along with Olympic Broadcast Services, plans to produce more than 10 hours a day of 3D content from the games. Panasonic has a lot riding on 3D and the lack of content is limiting adoption of the format. So it’s no wonder that Panasonic will try to produce as much 3D content as possible from an event that has worldwide appeal. Hoping to speed up content creation, especially for regular consumers, the company debuted its newest 3D camcorder, the HDC-Z10000. It has a 6 and a half megapixel sensor and can shoot 1080p hd video. It also has two new image stabilization systems, which according to Panasonic makes it easier to shoot in low light. This marks the second year that Panasonic introduced a 3D camcorder during the show, continuing its push for the format.

This could be the future of window shopping. If you like something, point at it to get product details. If you like it you can buy it from the sidewalk outside the store without even going inside.

It’s called the Interactive Display Window and is a project from Germany’s Fraunofer Institute. The system is made of a motion track and display. It can detect gestures of customers and provide them with more information on products. The motion tracker was a built from scratch device that the team has been working on for ten years, even before anything like the Microsoft Kinect sensor hit the market. In fact, Fraunhofer said a Kinect sensor could be used, though theirs is specially tailored for the prototype project with infrared lights and tracking cameras.

The window is a problem for us because it’s reflecting light it’s reflecting pictures. This is a real problem and we found a solution that is working very well right now. And on the other hand one of the biggest problems is teaching the user how to actually do it.

Fraunhofer didn’t say what companies they were working with to further the project.

Sure you can get your email on your iPhone, text message your friends, surf the internet, but how about control your vacuum cleaner. LG showed off its Hom Bot 2.0 that can be controlled by your iPhone and it doesn’t just vacuum it can patrol your home when you’re not home. It’s capable of sending live images back to your phone as it moves around your house. It even maps the rooms in your house. It’s on sale now in Korea for about $800. And if an iPhone controlled vacuum cleaner how about a robotic window washer.

Called Windoro it’s a two part system, one side goes on the outside of the glass, the other on the inside and it’s held together by magnets. It can work on windows up to 1 inch thick, but it’d be a tough task to mount the outer unit if you’re in a high rise so for now, it might just be better to stick with hand washing.