Check out this awesome multitouch table developed by Idieum the MT55 Platform. It will set your business back nearly $18000 US though, but it must be worth it surely. I think you could drag around a piece of poo on this display and it will still be pretty sexy!
The bright 55″ 1920×1080 HD display has a 5,000,000:1 contrast ratio. A wide 178-degree viewing angle accommodates multiple users around the table. The optical multitouch system supports 32 simultaneous touch points for collaborative interaction. The system is multitouch-enabled from start-up, and runs Windows 7 64-bit professional edition.
The integrated computer is packed with power. It contains an Intel® Hyper-Threaded DualCore i5® which runs at 2.66 GHz, 8GB of RAM, and a 128 GB solid-state drive (upgradeable to an i7®).