This is almost completely true, but I would add the caveat that PWAs (progressive web apps) are not as easy to discover and less familiar to install as an app in an app/play store. It might also be because it’s in Apple and Google’s best interest to not streamline that. But it’s still an obstacle nevertheless.
I love this approach.
Nit: “If you can find prior art that describes such a system before June 13, 2013, you could be a winner.” … 2013 is a typo I’m guessing?