Don't they realize that Sony Online Entertainment is now a subsidiary of Sony Computer Entertainment?
@animefobber: I'm sure you'll see a couple of new things. They need to show the new PSP, and they need to officially unveil LBP PSP. I'm sure they also have 2-3 large scale ps3 projects to show off, whether they be Trico, Starhawk, or an unknown title from Sony Liverpool or another studio. There's also Twisted Metal PS3, but I think that is out of the question, given what David Jaffe has said on neogaf recently.
We'll probably see Hot Shots Tennis or something too. ;)