Oh right that is a little annoying. Especially on old XP machines and the way they don't refresh the DVI display discovery info after boot, ever. Win7 rediscovers the display after login so if you are ever on the wrong display at boot time and boot up in super basic default resolution just continue to log in and it will fix itself after a second, effectively makes it a non issue.
See there are legitimate reasons to move on from XP, actually the first time I updated my video driver in 7 and realized it didn't need a reboot about floored me. Took me right back to the first days where you could change your IP without a reboot in windows.