In January we'd reported that Jeff Han had formed his own company called Perspective Pixel to market large versions of his Multi Touch screen to companies.
Here's a new demo from Han on a much larger display. It appears they've created more user-inteface methods for touch screen -- with menus and selection methods being demoed:
https://www.macrumors.com/2007/02/12/more-multitouch-from-jeff-han/