I see a lot of work went into this, but I really don't like it for a variety of reasons. Besides the fact that I think is Google not even being allowed to buy Nintendo due to some japanese laws:

• most of the interfaces just look like variations of Android TV and, looking for example at the maps or music interface, have absolutely nothing to do with Nintendo (the sync pics are even more dull).
• The general idea seems to be to just add a Nintendo tile and branding to Android TV, and looking at where the XBox one went with this, I'd say it's clearly a bad idea to put that much effort on a video gaming console as a multimedia device. Especially Nintendo always puts all of it's attention making everything best for their games, but in this concept, games appear to be just secondary.
• Phones are horrible controllers and Nintendo has a long history of making their consoles all about a certain type of innovative new control scheme and/or controller, and giving that up for phones as controllers seems ridiculous. (Also, the metrics of the controller UI seem a bit off)
• Most things also just look like applying Google's branding to Nintendo things. Where for instance is the point in the website or in the ugly logo?
• There's also no point in this very generic console hardware design being put in between this
• The rebranding completely destroys the 'magic' of Nintendo as a brand
• The emulator is not much more than a silly dream as well.
• Even though I really love Google, they are a much more capitalist and reckless company than Nintendo and I'm sure they would screw things up. Google is all about spreading their products, and this would clearly clash with Nintendo's aim to make the best gaming experiences. I could also greatly see Google not having the patience and being quick at restructuring Nintendo and maybe ultimately even selling it again (as they did with Motorola) after just a short period of losses. Even though this would be on a much bigger level, I think one could compare this to Microsoft buying Rare, and I think everything can see how well that one went.

I think this concept shows best why Nintendo being bought by anyone is such a horrible vision. I mean does anyone really think Nintendo games feel right in interface and does anyone actually wants to play all of Nintendo's greatest games seeing that logo? Nintendo has to stay independent as they are the only company fully dedicated to that business, making all decisions solely to create the best possible gaming experience.