I think this 3 install limit is a very draconian security measure, what happens when you use them all up? You'll end up with a very expensive (at the time you bought it) coaster DVD!
If I buy a game it is mine to install and uninstall an unlimited number of times, no matter if I wipe out my HD and reinstall Windows as I always do once a year but also if there is a serious virus that requires me to do so earlier!
I hope they really get rid of this limitation, how come those that bought the game as a download don't have this limitation, none of this bulls**t!