Wait a second, you're telling me I can spend the cash to upgrade my computers operating system so I can use it to perform a function I already have a device for?!?
AND probably have it be a worse experience because of the natural problems that come with PC gaming (I.E. compatibility issues).
Well gee, now that you mention it, that sounds FANTASTIC. Except for the part where it doesnt. At all. I have a Gaming PC for the various PC games out there - which is good, except when I run into the plethora of issues PC gaming brings. I have a my consoles to alleviate this issue - I find the controller to be a lot tighter than the mouse-keyboard combo, and console gaming to just be easier (since I dont have to download, install, fiddle with the graphics settings, etc, etc.).
Bringing console games to the PC, without any of the benefits of a console, is just a bad idea. Focus more on making Windows 8 a better operating system, rather than adding features that are, quite literally, useless. The PC's that will have the capability of running Xbox games probably wont have an interest in Xbox games. Or, if they do, probably already own an Xbox... Not to mention that the 360 doesn't have that much longer left in its lifespan - we will probably see a new Xbox before Windows 8 is replaced by Windows 9. So while the feature is nice for some PR (if its true), it'll more than likely not be of any significance.