I'm watching a seminar being given by the head of Microsoft's game development, drawing similarities and differences between games and productivity software, and I gleaned teh following realization:

When people beat a game and it was enjoyable, they strive for the next version of that game. People don't sit waiting for the next version of Windows, either because it's not enjoyable, or because they haven't beaten the current version yet (if you view the struggle to create a usable, workable system as a game in and of iteslf).

People lust for OS X 10.2 because 10.1 was enjoyable, and people beat it. It's stable, it does what it's supposed to, and ironically enough, people aren't satisfied with that, because they like the twin challenges of new functionality and troubleshooting.

Well, the geeks, anyhow.