[saturdaysaint]

Complicating the picture is that "licenses" includes upgrades and OEM copies. If I had to hazard a guess, I'd imagine that the OEMs represented a modest bump over Windows 7 - basically just reflecting the expansion in the market for PC's - but that the bargain basement upgrade price convinced a lot of enthusiasts to upgrade on day one.

Anecdotal, but even the dyed in wool Windows guys I know (gamers, .net programmers, etc.) were slow to upgrade to Vista and Windows 7. $120-$300 upgrades that didn't improve performance were hard to justify - the money was probably better spent on graphics cards and games.