Sony has a PS4 app just for E3. You can watch Sony's press conference, live (June 9, 5:45pm PDT), and once the show opens see trailers and screens of everything on display. It's like you're there without the miles of exhausted walking in sweltering LA heat around gross, sweaty nerds.
The app also lets you earn Sony Rewards, encourages you to try out 30 days of Amazon Prime, and there will be 6,000 PlayStation Now Private Beta codes given out. Anyone trying out PS Now? Is it working alright?