According to the official E3 page, the third episode of the Half-Life2 franchise will be shown for both PC and Xbox360. The PS3 will not be part of the show. It has to be reminded that PS3 gamers are still waiting for the Orange Box to be fixed, 8 months since its launch.
Updates:
My bad, E3expo.com is the official E3 website. E3.net is however part of the same network, so all mentioned on E3.net is true.
