Of course the Microsoft Surface is a gimme, but the X-Desk may be some competition. It is 52-inches, as opposed to MS’s 30-inch surface, and also reacts to multi-touch input and zoom. Interact with maps and images and play media files. It can also be used with PMPs and cell phones via Bluetooth. The X-Desk, which was developed by Impressx and Engage and runs with Epson 3 LCD projectors, will cost you $20,000, about the same as the Surface.