Sony started E3 with a big handicap because of the PSP Go being leaked, it was one of their major announcements and definitely stole some of their thunder. They didn't fret over it much, rather the conference was peppered with jokes about stuff not leaked. However Sony did have a few other aces up their sleeve.
After the initial number crunching stats the conference really started off with same game play demos. There was an excellent demo of Naught Dog's Uncharted 2 which was followed by an equally impressive demo of Assassins Creed 2. Both games looked sharp and more importantly the looked like sequels that would be actually worth playing.
Sony also demoed their motion controller which unfortunately was nothing special, but that was to be expected after Natal. Then is was the PSP Go's turn to be officially announced after a joke about naming it the worst kept secret in gaming history. The hardware finally gets rid of the UMD and is lighter and smaller the old PSP model. In addition to the hardware a lot of games were also announced for the PSP including Gran Turismo 5. It should do well assuming third party developers increase support for the platform.To wrap it up Sony bought out the really big guns. First up was the shocking announcement of the next Final Fantasy game exclusive to the PS3. It was really odd considering that FF XIII is still nowhere near release.
The game play demo of the show was definitely God of War 3 - with the series' signature ultra violent game play in glorious HD no other game really had a chance.
Even though Microsoft has Natal and Alan Wake the best conference was definitely Sony.