I suspect they won't get squeezed out. Nettops will be used as travel laptops. Smartphones as well, but for lighter purposes. This includes phoning, but not only that. I suspect Nokia realizes this, and I suspect the smartphone will be merged with the PDA and Internet Tablet. That doesn't mean the NIT dies or gets 'squeezed out'; it'll just be able to do more.

Think about it. Qt + Linux or Qt + Symbian? As long as you have your applications!

BTW, from TV I learned the Dutch law says one isn't allowed to hold a phone in the car while driving. This is against phoning + driving, but it also counts for e.g. SMS, or even navigation. I should look the law up but this sounds like a loopwhile where one can phone using the NIT + SIP (+ WAN like HS*PA or WiMAX) in your hand.