@sarge1445: It's probably going to be a lot of sales talk about how great the PS3 has been, followed briefly by some talk about the Vita and the PS4. I wouldn't worry about missing the livestream, anything interesting will be everywhere within seconds.
Probably stay up to watch it, not like this sort of thing happens all the time. I'm surprised Ryan hasn't said if GB were doing anything special, not sure why but thought they'd possibly do some live stream or something, I dunno. Still, excited.