Until PC software sales can come close to console numbers, I don't think Microsoft will be changing anything. MS has positioned themselves to be the all-in-one media player with the next generation.
A PC already is an all in one media player if you want it to be. Got an old desktop sitting in the corner with a spare IDE slot?
There's no reason PC games shouldn't sell as well as console games if someone really wants to promote the platform - the advantages of doing so are obvious, no need to pay a per game royalty fee to Sony/MS/Nintendo, and you can sell directly to the buyer, over the internet, as opposed to on plastic and metal through a network of wholesalers and retailers who each take their cut.
The problem is, IMO, that PCs are rarely specialist gaming machines. No one buys a PS3 just to play one or two games in 5 years. Once you spent $300 on the hardware, you need to justify it with several games. I'd guess a lot of people own half life 2 or one of the other triple A PC titles, who have minesweeper as their second most played PC game.
Big market out there for the right people.
This post was edited on 2/9 at 11:43 pm