You and Matt may over estimate how much attention people pay to advertising.
People dont know what a hybrid game system is and I don't think they will care enough to focus on an ad to find out. The categories entrenched in minds are home/portable. Those are your choices. N has chosen 'home' and yet they show portable. That is a real issue once you move beyond people who actively pay attention to game advertising.
Youre also under estimating the power of advertising in and of itself. Go back to the Wii, they properly advertised it as the first games console that can be played with motion controls. The reveal was cut throat and to the point in "this is what it does and what its capable of." Before then gaming was always relegated to standard controllers and buttons and thats all people ever knew, but because they properly advertised the system it worked. Imagine throwing the Wii onto the market with 0 advertising whatsoever, People would be confused at to what it does because a message was not conveyed to them. Case in point look at the WiiU, The advertising for it was abysmal, neither its reveal nor commercials sold it well as a brand new home console. Its reveal focused solely on the controller and its name only further confused consumers into thinking it was an add-on for the Wii. The message was not clear and they didn't sell their concept well which led to the WiiU's struggles. So far the Switch's reveal has been more on the Wii side wirh a proper clear cut concept than the WiiU's marketing mess..
Another example take a look at No Mans Sky, advertised as this grandiose game of epic space travel never been attempted before. They sold its concept on proper advertising and positive word of mouth. People understood and believed in what they were getting, of course we all know how that turned out. Despite its overly negative reception the game still sold well. It goes to show that proper advertising and marketing is key into getting product into consumer hands.
Same goes for the likes of Splatoon. Nintendo has been notoriously known this generation to have very limited advertising for its WiiU games, because of that many people thought Splatoon was going to crash and burn in the same vein as W101 and Codename Steam. But Nintendo actually marketed Splatoon, they advertised it heavily and sold its concept of being a unique TPS not really seen before and because of that the game went on to become one of the biggest new IP's of this generation.
Nintendo seemingly has learned from its mistakes with the WiiU and 3DS, the reveal trailer as I stated earlier has sold the concept very well, and reactions around the internet have shown that the concept isn't as foreign to people as you so strongly believe. As long as Nintendo keeps up proper advertising and marketing and the word of mouth continues to be good then there really wont be an issue.
Also your comment of "N has chose home and showed portable" is completely off base as the initial trailer clearly showed both home console and portable, aka both playing on the TV and on the go. Again the message was pretty clear but it seems to you it wasnt, so maybe your right, I mean if you cant even understand whats going on what hope do we have for everyone else right?