I agree Off-TV play is a really nice feature, but in my opinion the cons outweigh the pros.
- Few games use it in any meaningful way.
- It's bulky and unfamiliar.
- It muddies the image of what the console is (is the tablet the Wii U?)
- It raised the price of the console significantly.
- It threw away the momentum they had for something none of their install-base wanted.
While I love my Wii U, it's destined to become another 20m failure. I hope that I'm wrong and that with time they can really iterate on their online functionality and get some better 3rd party support, but I'm not optimistic. If nothing else the 3DS is killing it, so it's not like they're going broke any time soon.
- Off TV play
- DS on steriods kind of works
- In a family house hold, having the game on both screens completely gets rid of "You're in the way" frustrations.
- Wireless display streaming!? (When this gets better, it will be amazing).