Caught up with the Sony press show this morning, and I gotta say I was a bit underwhelmed. It seemed the best stuff they did was essentially not doing anything at all - e.g. no used game restrictions. Games looked good, but as far as exclusives (as Aki mentioned) it wasn't all that exciting a showing as most of the titles were multi-platform. I liked the Xbox One exclusives on show a bit more than PS4 (Sunset Overdrive, Quantum Break, Project Spark, Killer Instinct, Crimson Dragon).
As for price, good on Sony for keeping it at $400. Though, having said that there is the fact that the PS Eye is sold separate for $59 bumps the price up closer to Xbox One. I know, I know. PS4 buyers will say "but I don't want the Eye!" - well, no you won't... until Sony releases a must own game for the peripheral. In my eyes, to get the full PS4 package you're spending $20 more than the One and get an extra controller out of the deal. Not really a $100 savings when all is said and done.
Since Will was rating the press events, I'd give Microsoft a B+ and Sony an A-. I think MS delivered in terms of games and had (amazingly) a largely meme-free affair. No Kinect, which surprised me. Sony had better news, but fewer exclusives on show. Price wasn't as big a deal, as I noted above, though I do think it'll help Sony. Don't know if I should praise Sony for their best bits since, as noted, their best was doing nothing at all.
I have a feeling Nintendo will have the best show, since the hardware is out and it'll be all game focused.