Re: huh?
Believe it or not, it wasn't a gamer requirement. It was a requirement for complex graphical applications, including DTPs, vector and bitmap graphics, CAD, etc.
Try to scroll a complex documents with lots of text in different fonts, antialiasing, kerning, etc., and some complex graphics, and try to render it smoothly while the user scrolls or zooms it...
Then ask yourself while none of such applications are available for Linux - I mean *professional grade* applications...