"Gaming on the go has been mastered by phones"
Are you kidding me? There is nothing worse than gaming on phones. Google Play store is TRASH, App Store is TRASH, so many games I've seen are either knockoffs, freemiums(ew), or just bad games that get boring after playing them once.
Also, don't get me started on the no physical buttons. Gaming isn't easy without the buttons(especially minecraft. I've tried PC and Mobile version, PC is clear winner).
Portable handhelds will have a place. Maybe not as big as the DS and PSP(those monsters sold over 200 million together), but still good enough, cause people who want to play real games would prefer a handheld with a store of actual games approved by Nintendo, instead of a terrible app store that has almost anything pass through it.
Oh, and don't remind me on how many Minecraft mods I see on app store. There's a minecraft-version of everything. FNAF, pokemon, fallout, etc etc.

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12/22/2016- Made a bet with Ganoncrotch that the first 6 months of 2017 will be worse than 2016. A poll will be made to determine the winner. Loser has to take a picture of them imitating their profile picture.