According to Gunn's from http://www.youtube.com/user/TheGUNNShop.
The next Microsoft OS, Windows 8 will feature Xbox games compatibility because the next Xbox will be Win 8 based. Meaning that it will be running the Win 8 OS.
This is really a good thing and a bad thing because each time Microsoft release a OS it is like $400 Australian dollars. So the console will probably be about $700 Australian Dollars. However it will mean that you can play your games on your computer if you are unable to play your console.
Also if the console has compatibility with 360 games it means that you will be able to play 360 games on your PC.