-- (deprecated) Microsoft Windows OS (XP/NT/Vista)
---- Bill Gates Gives A Hint, Windows 7 May Come By 2010
Hester - 9:11 am on Apr 17, 2008 (gmt 0)
Windows has used the hardware acceleration features of graphics cards since the early 90s.
AFAIK not to draw the entire OS - every window, every element. You couldn't have spinning windows with live video in them in XP. Or scalable applications where the entire contents of the window rescale in milliseconds. Correct me if I'm wrong.