Apple could be about to introduce a software development kit (SDK) for its Apple TV at WWDC this week, enabling third-party developers to create apps for a brand new Apple TV App Store.

That’s according to Boy Genius Reports, who also reported in May that Apple could unveil a new operating system for its television products at this year’s Worldwide Developers Conference. This operating system will be “much more feature complete,” according to BGR’s source.

BGR believes the TV related launch from Apple “could easily be the biggest announcement from the WWDC 2012 keynote.”

Forbes reports that Apple will introduce an Apple TV App Store for the third-party developers to submit their apps to. The new App Store could be part of iOS 6, which is also set to be announced at the keynote today.

Last week, Jefferies analyst Peter Misek sent a note to clients claiming that Apple will unveil its smart TV, which he believes will be called iPanel, at WWDC, and will launch the product later this year.

But whether or not Apple introduces an actual smart TV or a major software update, Forbes predicts “TV will never be the same.”

To watch our live feed of Apple's keynote at WWDC this evening, tune in here at 6.00pm.