I was assuming we'd still have laptops and every other form factor we have now, just that you'd need your smartphone in your pocket to actually use your laptop.

I was assuming we'd still have laptops and every other form factor we have now, just that you'd need your smartphone in your pocket to actually use your laptop. It is the hub, it has all your files, it is automatically backed up over the net, etc. Same thing with tablets. You could interface with an e-ink display for reading and an iPad-like device for entertainment and consumption. Your smartphone would store your save games and character data for various video game consoles, etc.