I have my doubts, yes there will be tinkerers who build their own apps, but this will be roughly the same crowd who today tinker with home automation, soldering or model trains as a hobby (or as Douglas Adams said: "I am rarely happier than when spending an entire day programming my computer to perform automatically a task that would otherwise take me a good ten seconds to do by hand" - just replace "programming" with "vibecoding").

I don't see 'grandma' building here own calendar app via Claude Code that reminds her of the family birthdays.