One Justin gets an audience (now, in the short term).
One thousand (or even one hundred) Justins are not so interesting.
When the draw is pure novelty that is true. When it's someone you're particularly interested in it's not. Maybe only startup founders find Justin interesting, but there's a "Justin" for every group of people.
Some exhibitionists might take to it, but who's watching this stuff?
When the novelty fades, it'll go back to being just another toy.