[roughly]

If you're asking aspirationally, I agree - I'd prefer a world in which this was what people expected and wanted from their technology. I think the ongoing success of Lego gives me some hope here for a mass market for tinkering.

If you're asking more practically - the success of Raspberry Pi, Arduino, Seeed, and others suggests there's at least potentially a market here sufficient to sustain a moderately sized business for long enough to be worthwhile.

Agree about the demo, too - there's some serious wizardry on display there. I think it's one of the projects that just gets more impressive the more time you've spent trying to do what they're showing off.