Laptops aren't computers any more, they are thin clients connected a mainframe somewhere. That we call them laptops and the cloud doesn't change the use case.

I think you are almost completely wrong here. I have hundreds of students, most of whom have a laptop running a desktop OS. Practically all of them run normal desktop apps.

I mean dosbox. Look behind the counter next time you're with a human bank teller or checking in at the airport. You'll find a screen running telnet connected to an instance of dosbox running on some central server.

Bank tellers make up an absolutely tiny proportion of desktop OS users, most of whom run normal desktop apps. I have seen tellers connect to terminal apps running on a server, though, so I know what you mean.