>Smartphones will be their first and last computer
No, unfortunately smartphones are toys at best. Nobody uses them for real work, just consumption and browsing facebook. When they go to work, they will use a real computer.
That's just... not accurate. I know lots of people who do real work on smartphones. Hell, I'd be dead a few times by now if I didn't use mine as a radar HUD while photographing tornadoes. (While also using it to report digitally directly to the weather service, and running a GPS tracker so that they both can see me on a map and so that I later can geotag photos taken on cameras that don't have integrated gps). To say nothing of how much I use my phone to take photographic and text notes. Don't make the tremendous mistake of assuming that just because you can't find a use for a smartphone in your line of work that nobody else can or does.
I use my iPhone to collect data for OpenStreetMap. If you ever find yourself in London using an OSM-based map, some chunk of it will likely have been created using my pointless silly Facebook twit-machine.