Imagine future cashless society with mobile-only payments. And a smart-car that needs a phone to open/start. And a smart-home with front-door unlocked with a phone. If you loose/break your phone - no problem, you can replace it with a new one, borrow one or use that old phone you keep in a drawer just in case. Not a huge deal. But if your account gets locked you have a problem. I'm afraid we as a society are giving too much control to a few corporations. It's not that of a problem yet of course