Switch is going to break the record and become the best selling console of all time. Believe it or not, these first two years are actually Switch's slow period. For the first two years, it's mostly just been selling on first party games alone and some indies and old third party ports. Starting in 2019 expect to see a lot more simultaneous releases from third party games and even some third party exclusives.
It's been a really long time since Nintendo had a home console with all of their first party games plus most of the best third party games too. It's going to be like the return of the NES, the most dominant console ever. Although domination in the modern era has a lot bigger stakes than it did in the 80's. Switch will become the best selling console of all time.
Ohh this, is.... Wow.
... you know Sony and Microsoft are releasing new console that are going to making porting to the Switch even more difficult than in it is now, right? Even now Switch ports are mostly all limited to games that aren't very resource intensive. Why on earth would this actually get better?
To start, I definitely do not agree with him about it becoming the best selling console ever but I agree with him about support growing.
I highly doubt that AAA support will grow much but then again he never mentioned anything about AAA support. I think in 2019/2020 we will see support grow quite a bit A-AA titles.
Things like indies, Japanese games, kid/family titles, previous gen ports/remasters, retro compilations, free to play games, and various current gen down ports will all see improved support on Switch.