I would understand phones tending to get bigger if the iPad had been a flop and tablets had not been able to prove they are relevant for consumers.
With tablets being superior on all aspects except for making calls and taking pictures, what I want is a minimalistic phone. Big enough that I can text, take pictures and make calls. And that I can plug to a tablet anytime to provide it with 3G connectivity.
And when I say "plug to a tablet" I mean that in the most meta sense you can imagine, what I want is somehow to be able to use my tablet using the same data plan as my phone, and that all my data can sync seamlessly from my phone to the tablet.