I get that you're probably excited about these games... But boy are you overselling their importance.
Sunset Overdrive looks to be Jet Set Radio grinding mechanics paired with shooting. Cool idea? Yes. Revolutionary? No. As for its art style, yes, it's nice, but once again, nothing revolutionary. Other games have done color and style in crazy ways before this one. SO isn't doing anything so special that it'll have an effect on the industry as a whole. (It looks like it might be a fun game though.)
Splatoon is an interesting suggestion, and I'm certainly more inclined to hear you out on that. A shooter where the main goal isn't, "Shoot that guy," is an interesting idea. The movement mechanics as directly connected to the art and color are likewise quite novel. IF it reviews well and others debs take notice, I could see something like this getting integrated into other more popular games in the future. In that sense, it could be important. More than likely though, I bet the game gets very little media attention, is blown off by most outlets even if it is good, and quietly disappears. That's probably the pessimist in me, but it wouldn't be the first time it's happened to a Wii U title (ZombiU).
So I guess I strongly disagree.