Well, my turn to give impressions on my experience with "the truck", I suppose.
Actually although the truck was there at the entrance, the different games were displayed on several setups in a huge hall, which made the whole thing quite weird. But I suppose it's ok for a very temporary event, although it doesn't seem to be as cool as Sony's "Appartement 4" by the look of the pictures (but that one is meant for the press of course).
My general impression : diminishing return indeed. I'm no graphic whore (I didn't know what screen tearing was before Gaf started mention it, and I hate you all for that) and I thought everything looked fine, but it didn't look too different from current gen either. I wouldn't be surprised if most of the audience would feel disappointed with that coming gen, and won't switch consoles as fast as MS or Sony would have hoped.
The controller : feels great and intuitive. Actually I was playing for several minutes until I remembered the controller was new and I should focus on it to see what changed. Of course it came to my mind as soon as I used the d-pad for the first time, since it's really different from the 360 one. And it's much better, very similar to the one on the Vita (I've always loved microswitches to control games). It should be great for games in general and fighting games in particular, I could pull off specials based on multiple QCF with no issue in Killer Instinct. I can confirm that the shoulder buttons are meant to be pushed by the middle part of your finger and not the tip, they're easily reachable by slightly raising your fingers from the triggers, it worked like a charm in Dead Rising to switch weapons.
Kinect : well, I'm quite used to playing with the first one, and the second feels very similar, but I never had major issues with the tech (nothing like the horror stories that are so common here). The ability to detect opened/closed hands is a nice addition of course. Unsurprisingly, the annoying shimmering of the laser pattern is gone, in its stead there are three red glows that you can barely see when the device is on.
The games :
Zoo Tycoon : Not my kind of game at all, but very nicely done, I appreciated the time I spent on it. Everything is intuitive, I could build a new den, adopt two lions and a giraffe, build extensions and feed a giraffe, without needing any instruction. The feeding part is quite funny, with nice animations of the animals. The graphics are nice in general, but there is a mode where you can walk around your park and in that case you can notice a low framerate in big panning motions.
Kinect Rivals : Nice and fun, I tried both the jetski races and the climbing game. Both were set on easy, so I won everything without any issue, but as a consequence couldn't try some competitive elements like grabbing your opponent's ankles when climbing. I liked the jetski controls (open hand to brake, close hand to accelerate, lean forward or backward to do flips when in the air) and the "jump and grab" move in climbing. I do miss the tone of the first Kinect Sport, though, with the music samples and the avatar dances.
Peggle 2 : Well, it's peggle. No need to play it on next gen, and no need to buy the sequel if you already own the first one IMO.
Lococycle : I was quite pleasantly surprised with that one. The game is not very pretty, but quite fun. Very hard to control at first, any small motion on the stick would translate to big swerves of the motocycle, but once you get it it's quite dynamic. I'm still not sure the full game would be worth it, but I'd definitely buy it for 10€. Maybe 15€ if the reviews are good.
Dead Rising 3 : Well it's the dead rising we know. Zombies everywhere, many weapons lying around, crazy moves and silly outfits. It was a night level so everything was dark, but everything else was nice. I'm not sure I'll buy this game at launch since DR2 was already starting to get old, but the game seems good.
Killer Instinct : Only played it long enough to test the controller D-pad and get a general idea. Looks good, not my favourite type of fighting game, but I think I'll still get it at launch.
Forza 5 : Yup, it's a car all right ! Definitely not my genre, for me all simulations have been looking the same for the last 10 years (I told you I was no graphic whore).
Couldn't find
Ryse nor
Crimson Dragon (actually I forgot they were meant to be there). Ignored
Battlefield and
Fifa since I don't play those games and there was a queue to try them.