The only thing I ever expected Socom to do was get the Socom die hards who haven't picked up ps3s yet to finally hop on board (like my cousin's boyfriend).
Socom was a $40 downloadable title akin to Warhawk, Siren, and GT5P, and it was made by a second party developer rather than Zipper Interactive.
Actually, prior to E3 many thought this was just a placeholder Socom while Zipper was working on Socom 4, the next "real" Socom. The announcement of MAG blew that theory out the window.