> On the consumer side, storage will become an appliance, like a (stick of butter sized) fridge. Or just included in your centralized home + family control center.

You can already get an inexpensive Synology NAS with a slick UI and backups to a cloud provider of your choice, or Nextcloud, although there's probably room on both for one click import from your existing Dropbox account using your auth and their API to migrate contents.