Big question marks, IMO.
- Warhawk, while good looking, doesn't have that WOW factor to push it over, at least not in that video footage I've seen. Yes, clouds and water looked great, but I'd be lying now if I wouldn't say that I've seen very similar looking clouds in one PS2 WW2 flying game demo called Heroes of the Pacific, couple of days ago. Clouds in that game were just incredible looking, had that same blinding golden directional lighting effect from the sun, obsured the view when you were inside them, in a word, completely volumetric, there was craploads of them, and it moved at a steady 30FPS. Yes, clouds in Warhawk do look better and fluffier still, but it's not as huge difference as you might think.
- Motorstorm, if they pull the game closer to the target video, then sure, it will be higly impressive. It needs much better looking particle effects and motion blur (or to be at 60FPS) though. It also needs some detailed vehicle damage. I do think they are on their way to deliver, the impressive physics and vehicle models are already there, but I don't know if they will have it ready for E3.
- GT5 is a complete wildcard for me. I have no idea what Polyphony will deliver. Will we see a playable demo with super-detailed car models like those from the teaser video?