>What will the mobile phone of the future look like?

Pessimistic guess: a lot like current spyphones but opting out of them means opting out of 99.9% of civilization. Also they'll be so subtle (like built into your body) that large sections of society won't know they're even a thing thus leaving them powerless to resist.

Optimistic guess: same, but AI displaces our human overlords and treats us better than they do.