I really like the concept, but practically for MMO play it's faster to use the left-hand hotkeys or click buttons in the UI. I could see the video touchpad having a lot of awesome uses though (minimap, buffs, quest log, etc), and the buttons above the trackpad would be pretty useful for non-combat items like inventory, settings, character screen, crafting and things like that.
http://www.razerzone.com/swtor/keyboard
At around $200 this is a lot more likely to sell.