In the spirit of everything can be found on the web - here is Jeff Han demonstrating a multi-touch display device. Of course, one of the problems is that he claims that a touch screen is a good replacement for a keyboard. A device with physical feedback for typing (and fixed position) enables your fingers to get a motor memory for typing. Jeff claiming that a keyboard that "follows" your fingers might be better seems less likely.

I would love to have multi-touch on my tablet though.