I love this idea. With insane mobile processors, terabyte storage on phones, external GPUs, and USB-C docking, we're tantalizingly close to "I do my computing on this device. It's in my pocket with a phone interface right now. But once I plug it in at my desk with the GPU dock, it's my computer. And later, I'll throw it in the tablet and use it on my couch."

Backups will need to be good and easy if your main computing device can fall out of your pocket on the subway, and an OS which is happy doing this will need to exist. But for many people, this could be a beautiful world.