Keyboard and mouse support is irrelevant. Its completely impractical for use by most people. Theres no point in mentioning it really. I could play a FPS on my PC with a track pad, but its not like its worth mentioning now is it?
Most people don't care about graphics beyond having a functioning, visually pleasing game. Better graphics is still generally better but not at the sacrafice of other important factors such as gameplay.
Early adoption isn't applicable in this case. Its an updated specification not a completely new console architecture. People will continue to buy the console for the reasons why they buy the console now.
The PS3 will lose the dev support of the companies wanting to push the envelope technologically. Just having a directx 11 GPU is enough to entice most of the publishers to build a game engine specifically for Xnext/PC.
Tease.
