About time they realised or they are being cheap and doing this instead of making a new console 
http://www.computerandvideogames.com/article.php?id=260220

http://www.computerandvideogames.com/article.php?id=260220
this is the 3rd time in about 10 years they have said this.
nothing will probably happen this time either
I find it highly amusing. I think that either yes they are too lazy to make a new console so 'lets do PC stuff for a while to tide us over' or its just MS spouting BS as usual.
well they did just announce two exclusives
They are making the new console right now, as it has always been...
MS have gone on for years and years about how the average end user PC isn't powerful enough to justify they spend significant amounts on even generating decent ports of triple A titles.
Theres a vast amount of money in the games industry and having games ported across to other platforms can earn companies a fortune. Look at the revenue of world of warcraft or the sheer volume of sales from modern warefare 2. If you listen to the community and have some talent is pretty damn easy to make a fortune in this area and microsoft understand this.