Remind me again why Modern Warfare 2 is supposed to be a day one purchase?

[Rainbird]

It's a day 1 purchase for me for a couple of reasons.

1) I don't rent games, and I want to play the singleplayer campaign really badly.
2) I don't own CoD4:MW on PS3
3) I want it for splitscreen play, both for competitive and coop multiplayer.

Tada.