Well I was looking on the internet when I stumble across this article....That says that Epic is very open to the ps3 hardware and
heres what Epic qouted "We pretty much know that Gears of War 3 is going to be on the ps3"
Here is the article its self so go read it and MS only had a contract for Gears of War to be exclusive for the first 2 games so you never know
Http://www.psu.com/Analyst--Gears-Of-War-3-on-Ps3-a-possibility--a0002233-p0.php
So there you go and leave me feedback If you think it would happen
Uncharted 2 is a blast