People do literally everything with their smartphone.

there have been several waterproof smartphones on the marked since the z3 launched

You can buy a waterproof case with a strap for like $6 that's clear and supports touchscreens so you can take pictures in the water. So basically anyone that wants to can.

I do - because audiobooks. Streaming (or even downloaded) video is less convenient, but still possible.

Yes, you're right: Approximately none of these people have a ticket.