Not the whole truth. Any Wii games purchased off the eShop that had classic controller support will be able to use the Wii U game pad as the controller and/or screen.(Though none are released in the NA region yet.) One can currently use the gamepad as a screen for any Wii game and it has a...
The market will not. Luckily Nintendo creates their hardware to be profitable from day one. This looks to be like the PS2/GameCube/Xbox gen where the sales are low for Nintendo, but the profits will still be good. There is also hints from that gen that are showing now where there might not...
The 3DS version is the best version of OoT. A remake of Majora's Mask is also going to be released next month if you want to play that one again or experience it for the first time.
You can get a Link to the Past on the Wii U eShop.