But I want to know what that means for games that want to use multiple tablets?
Like Madden? Maybe this is what Nintendo is currently trying to solve?
Well: I play Halo very often with 4-players splitscreen, and they solved it by reducing the overall graphical quality.
Let's think about this case: you play Madden on the controller only - no TV.
And let's take the visual differentiation system from a PC Game - High, Medium and Low.
If you play alone - High settings for you. Maybe even a bonus perfomance boost because you play on the controller only.
If you play together - 2 players - it could either still use High settings because the game is rendered at 480p or it has to switch to Medium settings.
If you play the game with 4 players it has to switch to Low settings which means it has to use lower quality assets so that every player has a steady perfomance. But maybe it's like the case before and it can use Medium settings because of the resolution of 480p.
You see, I don't know much about the technical stuff, but this is how I imagine it. There is a reason why you can't play Gears Of War 3 or Uncharted 3 with 4 players because they have costly engines which provide incredible visuals.
It really depends on the visual side of each game: if it is intensive - mhm, there is a chance that you can't play it with multiple tablets. If it has really simple graphics - sure, why not?
Another important point is: will Nintendo restrict the number of tablets being used at the same time to - let's say - 2 tablets only? This could be really stupid because some developers might be able to create games capable of letting 4 players play at the same time.
This will be really interesting to see.