Originally Posted by darthrsg
Kidding aside, after spending time with the Wii U I'd love to see some marriage with the 3DS/DS. Buy the game in the eshop use the TV as the top screen and the gamepad as the bottom or a 3DS like a controller. There's tons of games on those handhelds I'd love to play.
I'd want a full fledged 3DS Player in the style of the Game Boy Player for the GameCube with a cartridge slot and integration to the Wii U for other features like internet connectivity to reduce costs and simplify the experience. Plenty of USB ports on the Wii U so even if it had to tie up two of them in order to provide adequate bandwidth, I don't think that would be a hassle for many.
Some additional features I'd want...
-Pro Controller support
for games that don't utilize the touch screen (Sideways Wiimote options such as for 3DS NES downloads and Classic Controller support would also be nice).
-Switch to swap between streaming the touch screen and the top screen
via a button on the gamepad to change which screen is streamed. This would enable off tv play for DS/3DS games that don't utilize the touch screen during gameplay (And there must be at least 1 game out there that doesn't have touch control but concentrates the action on the lower screen anyways which you'd want to be able to swap to output to the tv instead of the upper screen).
such as a rotation options for the tv output for games that ask you to rotate the handheld 90 degrees and a stacking option to display both screens on the tv for those with the playfield spread across both like Yoshi's Island DS.
-Full button remapping
(Including the option of mapping a button to a specific spot on the touch screen for those games that essentially don't use the touch screen beyond as an extra button like the left/right camera controls in Super Mario 64 DS).
And I'd never use it, but they'd need stretch options for those that hate pillarboxing (3DS touch screen and both screens of a DS are 4:3). And I suppose 3D HDTV support if possible would be nice for those that appreciate the 3D capabilities of the 3DS.