Until the Fusion exists, I predict it will sell 0 units because I don't think it will exist.
Iwata said the platforms would be "like brothers" as in similar development pipelines allowing for fluidity within teams and select cross platform titles. Not that the two will share one identity and one library and essentially one set of specs. Mark my words, the handheld and console will still have their own identities and their own libraries with some overlap where it makes sense (Kirby games, NSMB games, etc). The console will be the more powerful by a country mile, just as always.
What they are doing is making the development similar between them so that they can maximize their company's efficiency in terms of development. They are also probably working to make as many of their engines as scalable as possible so that they can limit the number of tool sets that they need to learn. That's the end game here. Not what is essentially one device for handheld and console (or two essentially identical devices with the exact same library)
