Prediction: The Nintendo Fusion will sell 80m+

[Soundwave]

Nintendo doesn't need to sell two versions. If you want just the handheld, then buy just the handheld. It's up to the consumer. 

And honestly it wouldn't surprise me if a "3DS TV" that played all Nintendo games for say $150, with Virtual Console, and had maybe say 3x the 3DS chip, allowing games to run on the TV at 720p say ... I wouldn't be surprised if that sold the same or better than Wii U.

Wii U is a low bar and it's selling like sh*t. I'm sorry but don't even try to spin like that is selling terribly. They key for the Fusion concept is the home version be a cheap proposition, and using mobile components that Nintendo is already using with their handheld will allow them to get an incredible deal on the chips and keep the price very reasonable (yet another advantage of this approach, you think any of Nintendo's Wii U vendors will give them a break on Wii U parts? Nope, look up economies of scale). 

The main thing for Nintendo is that they can sell their main games to their main userbase, no longer are their best games (usually on console) locked away from their biggest audience (on handheld).

Now that mobile tech has improved exponentially, they can have themselves a nice HD experience at home or away using mobile components, that's the game changer.