That there is the point. A phone is something you have anyway. Everyone has one. You get it on a monthly plan. You use it to communicate. Even if an Eee does all your computing, you'd still have a phone in your pocket.
If your phone does all your computing, the Eee stays home. If your Eee does all your computing, the phone still comes. Unless, your Eee starts making calls, it's a extra.
People were carrying around big uncomfortable phones @ ridiculous call prices. Once they got one, it went everywhere. Laptops, even 1kg ones, are a sometimes food
Looks like society is really turning in the direction of science fiction novels.