> 6. PWAs become more popular than apps due to lower cost to build and higher revenues.

I beg to differ. I think centralized online market service will become so dominant, there is no need for a small business to build and maintain any kind of app or website anymore. This is already happening, take look Amazon for retail, YouTube/Netflix for film/movie and Spotify for music as example. And the market for this is not saturated, so I'm guess there will be more and more online markets pop up in the future.