Now as to in-game innovation, I'm afraid Vicente's example's don't really compare apples to apples. You can't say "360 games are all the same" when your list is 3 titles from the same series. Of course, GoW 1 is like GoW2. But Gears of War is NOT like FIFA or Crash Bandicoot or Minecraft or Rockband, or Lego Star Wars or Dance Dance Revolution or Kinect Sports.
I am comparing 3 games of the same series of one IP with 3 games of the same series of another IP. I didn't even mix Mario 64/Sunshine/Galaxy with New Super Mario which I consider a different IP (even if both series are platformers). This comment was an answer to the general complain about Nintendo not innovating when iterating over their core IPs, when the rest of the industry in general innovates way less than them.
What I'm talking about is whether there's completely new game play ideas that nobody has done. It gets a little fuzzy when the others copy it, but usually there's a standout (like Minecraft) that everybody else recognizes as "the first"
From this viewpoint, unless the Wii has game innovations that NOBODY else has, what does the Wii offer that I can't get on a 360 or PS3? kind of like the exclusives but in my opinion, more important. You can't get Gears of War on a PS3, but it's an FPS and if you played one, you've sort of played them all. So play Resistance on the PS3 instead.
Up until a few days ago, you could only get a game like Minecraft on the PC and 360. That's an innovative game play that Wii doesn't have (probably still doesn't but I could be wrong).
Is there any truly unique game play on the Wii systems? Which granted, the WiiMote enabled, but now the other consoles have caught back up only to find it was cool idea but not great to actually use.
This type of innovation you speak about is not really tied to a concrete console (and Minecraft was a clone of Infiniminer btw). In general, if you value that a lot, then I would just go with a PC which is the system with the most vibrant indie community (where most of these things happen currently). Xbox360 is quite good there too with XBLIG (there were Minecraft-like games in XBLIG way before the official Minecraft for example, which sold millions). But for next gen (XB1, PS4, WiiU) all three main companies have been declared they are going to be very indie friendly (how much PS4/XB1 are going to be remains to be seen as their current declarations are too vague).
But again, I don't see how this goes against anything that I recommended:
- Get a PC: nearly anything on Xbox One and PS4 will appear on PC (more now than ever that the XB1 and the PS4 are nearly PCs, so I think we are going to see a lot of multiplatform stuff) or has a very similar clone on PC. If you care about experimental stuff, PC is king too.
- Get a WiiU: because you can't get Nintendo games on any other system. And yes, going strictly by genre, they don't have any exclusive genre that doesn't exist anywhere else. But Nintendo in general delivers very high quality design/gameplay.
Regards!