Sony, EA, and Square Enix Getting a Lot of Attention
According to E3 Insider, a lot of attention is going to Square Enix's booth, very near the same level of attention of the biggest studios and developers. This is almost certainly because of their announcement of Kingdom Hearts, but the new Final Fantasy and Deus Ex certainly can't hurt. With all of their new games (Star Wars: Battlefront, Battlefield 4) coming out, EA is also experiencing a lot of views.
Sony has also, notably, had many more views, consistently, than Microsoft or Nintendo's booths.