The iPhone was the next step in omnipresent computing. You always have your iPhone. It's two steps down from laptops (leap-frogging the tablet, which has come after the iPhone). The next step is either glasses with computer screens (kind of geeky), or voice-interface computers.
With a voice interface, you can shrink a computer down to the size of a wristwatch. Getting data out is a problem (display glasses? some kind of projector?) is an issue, but not insurmountable.
The iPhone was the next step in omnipresent computing. You always have your iPhone. It's two steps down from laptops (leap-frogging the tablet, which has come after the iPhone). The next step is either glasses with computer screens (kind of geeky), or voice-interface computers.
With a voice interface, you can shrink a computer down to the size of a wristwatch. Getting data out is a problem (display glasses? some kind of projector?) is an issue, but not insurmountable.
15 years doesn't sound crazy.