Can the 360 hit the "Exclusivity line"?

[selnor]

RPG said:
I agree 3rd party exclusives will come back but for that to happen I would think the install base would need to be about 50 million. The Wii will get support but of the 360 and PS3, well your guess is as good as mine to which will reach 50 million first (if any).

My sig gives a clue.