It was asked earlier the best way to watch this live, I'd really recommend
Sony's Live Events Viewer on the PS3. I had a perfect HD stream last year and it has the advantage of working from your PS3 so it's on your TV and leaves your PC/Mac to access places like GAF if you want to. You need to download it from the SCEA Store but I'm in the UK and I had no issues using it at all last year.
Don't think the App has hit the PS4/Vita yet or anywhere outside of the SCEA region but it's easy enough to access wherever you are.