Mario Golf looked pretty good, though I sucked hard at it. I sucked at the original too. The graphics look pretty good, though the camera was very glitchy if you pulled out too far or got stuck behind an object. They should be able to polish it up before release. Playable characters include Mario, Waluigi, Peach, Yoshi, Koopa Troopa, and Donkey Kong, and there were two selectable courses, Normal and Mushroom Kingdom.
Sonic played just like it did on the Preview Disc, so no surprises here. Same for Soul Caliber 2.
P.N. 03 was... unique... the controls were very difficult to use and you couldn't shoot unless you were standing still. It looked okay, but I just couldn't get past the controls and the fact you couldn't walk left or right, you just strafed.
I watched one of my friends play Ultimate Muscle, but it does looks pretty sweet if you like wrestling games. The cel-shading is pretty good and I have to admit it was funny when my friend's character started dancing on his opponent's face. Wacky stuff. All the voices were Japanese, so I don't know if that will change in the final version or not...
All the movies were brand new with new gameplay footage. I was most impressed with Mega Man, which looked VERY slick with cel-shading.