Don't forget that console games are more expensive to the buyer.
Here in Denmark the very expensive top PC games cost 449kr (about 60€) but most new games cost no more than 399kr, but I have yet to see a single new console game cost less than 500kr. That is 25% more expensive in general.

The ability to actually connect mouse and keyboard is not enough, the consoles still need the games that need those implentations to be able to cut into PC games. And I doubt that will happen as a large portion of consolers are younger than PCers. They have grown up with their games, just like we have, and given the general flak consoles have been getting here (the SEGA issue and Total Warrior) it is obvious that people are not inclined to move over right away.

But a major advantage the consoles have is the general lack of bugs compared to PC games. I have yet to experience any bugs whatsoever in a console game. Granted I have played perhaps 15 games or so the last few years, but try picking 15 PC games and play them, you will find enough bugs in there. Though this often has to do with the rather more complex games we get for PCs.