What a shock.

Yeah, I guess I should stop trying to give Nintendo credit at times.

From what I understand about black ops 2 split screen mode is it can do the same 2 player split screen as 360/PS3 with both players on the main tv or it can split the image so one half is upscaled to fill the whole tv screen and the other half is sent to the gamepad. It's no different processing wise to what the ps3 and 360 are doing with their split screen mode. It's making use of the wii u's built in hardware upscaler.

Lets not forget that the wii u version of black ops 2 has a marginally inferior frame rate to ps3 and is a lot worse than 360.

https://www.youtube.com/watch?v=doMx1UEKEzU

The idea that the wii u has the power to generate 2 full action screens when it can't even keep up in single player makes no sense. Especially when there is also some missing detail in the graphics of Black ops 2 on wii u compared to 360 and PS3. All have a native resolution of 880x720 which is pretty dire anyway.

Adding the resolution of the gamepad to the main screen resolution makes absolutely no sense most of the time. However I believe the gamepad can create a full independent action screen but this would be using the wii gpu that is embedded in the main gpu and would have more limited graphics dictated by that gpu's limitations. Also this would have a massive hit on cpu resources.

The key to the wii u design is a high speed compression section in the gpu which at any time can downscale and compress the main gpu frame buffer or compress the wii frame buffer and send it to the gamepad. The wii gpu performance level is 12 gflops (gamecube was 8 gflops), the wii u gpu is 176 gflops. So you can see the huge difference in performance level. Even if you add that 12 gflops to 176 gflops it's only 188 gflops. Still a huge difference to the 1.3 terraflops of the xbox one or 1.8 terraflops of the ps4 gpu's.

That is true in single player, the screen is simply duplicated but in local multiplayer it isn't, and again it is optional but it is most likely being used here
though I'm not sure but it is very likely

I said Assuming they're doing what shinen did, by the way WiiU is around 568 GFlops, also shinen stated that WiiU is more than capable of 1080p native sayong that it requires 16MB of eDRAM when WiiU has 32 and that WiiU could do 1080p 2MSAA or in some cases 4MSAA

Nothing is really confirmed though except for the eDRAM part doing 1080p 2MSAA

I don't know if you were implying that but yes at the moment it's a non issue anyway, since the big majority of games carry the burden of current gen platforms anyway. 

or you can stop beatng a dead horse

The absolute maximum the wii u gpu could be is 352 glfops when the x-ray was examined. The lower figure was 176 gflops. The weight of evidence now is that the 176 gflops figure is correct. Certainly the wii u can do 1080p easily  but this is likely restricted mainly to 2D games, HD upscales of gamecube and wii games and possibly some less ambitious games with cartoon type graphics.  It's unlikely a very cpu and gpu intensive game would go to 1080p as it would restrictive graphically with a lot of repeated textures etc likely and low polygon numbers. 720p or even sub 720p is most likely with the hardware upscaler used to take it to 1080p, to give the best visuals possible.

Why would I do that when PS3/Wii aren't getting Mario 3D World, X, Bayonetta 2, Donkey Kong Country Tropical Freeze, Mario Kart 8, Yarn Yoshi...

I'm sure you'll find plenty of brilliant games on the PS3 / Wii that you haven't played yet.