Saiyar on 30 July 2007
Tri-ace called it a high spec game, which to me suggests it will be for the PS3/360.
http://www.1up.com/do/newsStory?cId=3159370
"Star Ocean 4 is currently under development to meet the highest specifications, and is being developed by tri-Ace," said Yamagishi, and while they didn't state the platform or the release date, you can surmise that SO4 will be released on PS3, although a multiplatform release is not out of the question.
