I should also mention that while Windows 8 doesn't currently use the same software delivery architecture that XBox and mobile do, the potential is absolutely there. The CEO of Valve was concerned enough about it that he came out publicly against it.
If you are a gamer, I would at least think carefully before upgrading.
Don't live for pleasure, make life your treasure...
\m/ Ronnie James Dio, 1942-2010 \m/