What would Sony show for this event ?
I'm more conversative about the event. I think it's going to be based on existing or near shipping products just because it's not wise to keep promoting unavailable products like PS 3. People might think PS 2 is aging. Sony pushing PS 3 will just reinforce the perception. The event may also pre-empt MS's attempt to put down PS 2 during launch. So I speculate that the focus will probably be the Playstation family/brand. So let's see...
(A) Installed base and content maturity -- since XBox 360 would be unproven here from both developer and consumer perspective.
* PS 2 game sales highlights, awards. Restate PS 2 support from developers, exciting new games coming out. On the consumer front, possible bundling ? get people to spend more money on PS 2.
* PSP second wave of games (Talkman and more ?)
(B) "New" platform -- to dilute Xbox 360's newness
* (I wish !) One new PS 2 angle (Spin ! Spin ! Spin !). EyeToy 3 ? Another PSX ?
* New PSP services (borrowing from Korean's successful web browser + online tie-in)
(C) Sneek peak into the future -- to leapfrog MS's vision.
* Same thing as E3 (Large numbers, renders, ...). Many people didn't make it to E3 (I couldn't go last minute 8^( ). May be with user controllable tech-demos in E3 at best. I'd love to play with the ducks or fly-by the mountains just to get a piece of the future. No playable games.
EDIT: Grammar