IMO that's the worst of both worlds - too big to comfortably make calls on but also doesn't have a keyboard to write on. You can carry an external keyboard but that actually ends up being fiddlier to pack than a conventional laptop.
You're not wrong. I can't imagine not having a real computer personally, and the iPad + keyboard solutions are basically a construction kit for a terrible laptop which costs 1.2x what a good laptop costs.
I don't think I'd be annoyed making calls with a tablet though. I'd just use bluetooth. For me the challenge would be that having no phone would mean I'd have to carry something bulkier everywhere. So, in conclusion, I have no great ideas and I'd be forced to do phone + light laptop.
