Microsoft really just looked like a CG Fest of 3rd Party games, and Sony was only a bit better.
Nintendo announced games that are ONLY AVAILABLE on their consoles. Whether you like the games is a matter of taste, but the fact of the matter is Nintendo did a better job of showing you experiences you can only have on their hardware (and that content far outnumbered any MS or Sony exclusives by comic proportions).
All that being said, Sunset Overdrive really did look like something I would enjoy and actually looked "fun" and inventive (even if it is very much like Infamous), a refreshing change for the console