But it would be a sucessor, in the sense that it is, for all intents and purposes, the Wii U Gamepad that plugs into a TV set and has breakable controllers.
Read my responses again. I've given you both why it can succeed where Wii U failed, why it can afford to fail where Wii U failed. I've given you why that quote has little worth. It is just new platform speak; moreover being a hybrid is a bit more than just a Wii U Gamepad that can plug into the TV. Wii U Gamepad can't go on a train with you without the console.
Edit:
I'll post this again:
MoonFrog said:
When hybrid was off the table, shared library could not be used as a consumer side 'gimmick.' People aren't going to buy their first NX device because if they buy another they can play the same software on both. This makes me think about the advantage of a bundle and simultaneous release of both form factors, but a bundle would probably be too expensive, if the devices were designed to be stand-alone with the home console spec'd close to or above PS4.
Yes, shared library alone does change things on the production side by unifying development, and through this lessening the instance of droughts, which in turn would make the product more appealing to consumers. But it provides no hardware hook, which, going up against smart phones on one side and PS4/XBone on the other would not be a good thing to lack.
As such, I think hybrid is the best solution, if Nintendo can pull it off at a reasonable price. It sets the hardware apart from both phones and home consoles. It ensures the shared library for non-Nintendo software. So a hardware hook and a software hook. It is the most elegant solution to the issues Nintendo faces, provided it still cares about both audiences.
Moreover, leading handheld is leading from their relative position of strength. I think hybrid has always made the most sense but we thought it was off the table. Handheld only made the next most sense, but the rumors pointed home console. I think that is the only reason home console talk made sense at all.
Moreover, if it isn't clear, where is Nintendo likely to get third party support? Japan. So lead handheld.
Where does Nintendo have the healthiest market? Japanese handheld market. So lead handheld.
Where does Nintendo have awful third party relations? On home console. So lead handheld.
Where is Nintendo weakest? On home console, in the west. So lead handheld.
Thus, shared library falls into 'get handheld support on home console,' and shared library is best on hybrid device. Hybrid device that isn't over-expensive and power-inefficient dictates design around handheld side first, which is exactly what rumors suggest.
...
So, hybrid makes sense. Hybrid of the suggested specs makes sense. The quote has little to no weight. Even if it did, it is entirely consistent with NX being a hybrid. Etc.
Also, if you want to run on quotes, why not just use the Iwata suggestions that it is not a hybrid? Or that it'll have multiple form factors? I think it's clear that those are from early planning stages though and the hybrid breakthrough happened later.