Um...
Notch needs to pull his head out of his butt.
Why does Windows 8 worry him? Because people have this weird, bizarre, fictitious scenario in their heads where they lock down everything to the Windows store and take 30% of all sales from every software purchase in the Operating System, thus committing company-wide suicide in the process very likely.
Why is Valve "Saving the Entire Gaming World"? Because they made an operating system that... locks down everything to the Steam Store... that takes 30% of all sales from every software purchase in the Operating System.
Stupid. Double Standard. Microsoft's scenario isn't even -real-, and he's concerned about it. Valve's OS is committing the very act that he is/was concerned about, and he doesn't care, and in fact loves it in the same sentence that he is condemning Microsoft.
Can we please stop paying attention to this idiot now?