Satellite internet requires a direct line of sight between the satellite and the receiver, so a handheld phone in someone's pocket whilst they spend their day moving in and out of different buildings isn't an obvious use case
Yeah, Starlink won't be the last step signal to your phone or laptop but we could potentially have cell towers connected directly to Starlink with no other wires going to them. Or your house/car/etc could have a Starlink dish that broadcasts wifi, 5g, etc.