100% Vita..

It's 2 hours, so I would imagine around 10-20 mins talking about the PS3, maybe a price cut?

Most will be PS4 with some Vita stuff creeping in, but those will definitely be the focus. The PS3 is alright on its own, it probably has the best exclusive line up for this year

30 minutes of DRM speech,
30 minutes of Multimedia capabilities,
50 minutes PS4 games,
40 minutes Vita games,
30 minutes PS3 games.
_______
180 minutes total

http://www.kotaku.com.au/2013/05/heres-a-complete-schedule-of-e3-press-conferences/

Sony
6pm-9pm PST (11am-2pm AEST)

I refuse to believe that they will talk for 3 hours... But I guess that is fairly convincing evidence that they will isn't it?

It's a crazy long time, but obviously they have a LOT to talk about. The first 4 E3 conferences are going to wipe me out, though. (2am to 2pm here)

ps3=30 minutes
Vita=15 minutes
PS4=75 minutes

dammmn 3 hrs! i'm also having a hard time believing that, maybe its 2hrs (or less) with playable demos on ground floor for the press? but then again, why is MS conference only 2 hrs?

but i actually do hope its 3 hrs, that would be sick

I think PS4>PS3>Vita, if it was 2 hours long vita would get 30 min PS3 40 min PS4 50 min.

3 hours? Well that's plenty of time to cover everything for the PS4, Vita and PS3 with the main focus being on the PS4 and Vita. Looking forward to how important the Vita will be and how it will integrate with the PS4.