You know, that's an interesting point. There's a lot to be said for using one as a desktop. I've got a Motorola Droid laptop thingie around here somewhere that turned a phone into a pc-like device and it was actually pretty cool. A few generations of speed improvements and it would be fine for most uses. It's nice to have a single non-cloud state for your stuff.
My main need is for a phone to do the following: be as private as possible, make calls, send messages, occasional browser use, hotspot. I'm tired of being dragged along with everyone else in terms of complexity.