60% of Windows Vista to be Rewritten

Last I heard was that Vista is to come with DX9 and DX10, the things that use DX10 will make use of it, but it doesn't support DX9 applications (games), so when you run Half Life 2 or whatever, it'll use DX9. When you use Halo 2 or something like that, it'll use DX10. The issue I see that could come up here is if they have a weird implementation on DX9, or it's emulated in some way, that your 'legacy' software won't all run right. Again.

Also, that DX10 will only be available on Vista, so in time you DirectX requirements will get you to switch platforms.

So the average users of Steam (HL2 is still considered a relatively high end game?) use 256-512MB of RAM. So they'll only have to have 4-7 times that number to get about the same performance if they upgrade to Vista. Sounds a bit stiff as an estimate. I expect it'll be a resource hog, but I really hope that is overstating things.

Jam it back in, in the dark.