We'll forever be addicted to the shared global (or interplanetary at some point) information network, but the phone itself won't be needed forever. I don't think there's a way to get a human to not want to know what other people think about stuff or to more generally get information for free in real time. This plus access to computational power is a pretty good combo.
If the interface is a brain chip or a phone or whatever, it doesn't matter.
If the interface is a brain chip or a phone or whatever, it doesn't matter.