i think the majority of "true" gamers, WONT be buying the kinect. i personally wont be. i game to relax, not wave my arms and body around like an idiot. i dont see it killing gaming personally... a fair few people will buy it yes, but the novelty will wear thin very quickly. just like the wii did when it was released.
for instance, the missus got a wii for xmas, but hasnt played it since like...well....xmas