Feel they need to? More than actually do. For example, I'm writing (and surfing -- thank you, TenFourFox) on a 1.33GHz G4 PowerBook. (Last manufactured in January 2005, for the record.) I don't deal much with video, which would be unacceptable on this, of course, but Office and CS3 work fine, and MacTubes renders tolerably for the little YouTube I bother with. Hearing of people complaining they "make do" with their 3-year-old MacBook makes me chuckle.