This technology is in its infancy. It has been used to help people who are immobilized such as those with advanced Parkinson's disease to manipulate a cursor on a screen with limited success. As far as using it like a mouse to play games, forget it. The technology is not at that level yet.
Asus P8P67 WS Revolution | Intel 2600K @ 4.7 GHz | Win 7 Pro 64 |8 gigs Corsair 1600 | Two Diamond 6990's in Crossfire| Corsair AX1200 | Thermalright Silver Arrow | Western Digital Black 2TB 64 meg cache | Lian-Li PC-A71B | Logitec Z-5500 | Three Asus 26" VW266H monitors running under Eyefinity |