My best hope for Starlink is that it will provide sufficient competition to the incumbents to do better and extend broadband more widely and maybe even reinvigorate fiber. I don't see how it can ultimately compete except on the margins.
I don't think Elon actually thinks we'll all drop our ISPs. I think he thinks ISPs will have to up their game. And it's a decent way to make more money on the rockets. Rockets who's purpose is to get NASA, Boeing, and whoever else up their game.
Maybe I misunderstood?