Microsoft's had another idea all by itself… It's called Multi-Touch and will be coming to PCs in the next version of Windows. You can watch a video of it in action on the Windows Vista Team Blog.
I must admit, it looks a bit familiar. I get the feeling I've seen it somewhere before.
You can take a look at Microsoft's stunning piece of original thinking here.
Interestingly, Steve Jobs said that Multi-Touch made sense for the iPhone, but not so much for the iMac. It'll be good to see just how well it works on a desktop PC; and if Apple follows suit and brings Multi-Touch to the Mac after all.