I'm not 100% sure but I think this was the largest booth that Sony has ever had at E3. The giant "L" shaped building wrapped around Microsoft's booth, surrounding the green glow of Microsoft with the dark Sony blue.
Of course Sony needed all of that space to show off all of the new games for the PS4, Vita, and PS3 games as well as a large area for people to check out Project Morpheus. We'll have some more coverage later this week but until then enjoy this video tour of the booth.