Honestly, I don't get the "E3 is dying" stuff at all. If anything, I've seen more coverage of the happenings around E3 than ever. The health of the floor show is neither here nor there. If the purpose of the event is to provide a platform for selling products, then it's still easily the most successful there is. Even companies that don't show up still usually piggy-back off of it.
The problem isn't the show floor it's the trade show aspect of E3, in today's world of stock management they have a tendency to want most of their orders locked in by the end of the first quarter, so in this environment a June E3 is seen by retail to be held too late, like I posted earlier E3 needs to have a meeting with all its stakeholders including Sony and define E3's role in today's market by answering questions like do they still see themselves as a tradeshow or has their role shifted toward highlighting up and coming games and related products for the media/public and whether that means an earlier trade focused show for retail followed by a june E3 aimed at the Media and public or it stays the same,they need to meet and look at their direction.