Everyone got a cell phone. The only true indispensable personal computing device ever.
as soon as it gets past its still mostly dumbphone status to smartphone and just gets named phone, it'll be the one truly ubiquitous personal computer/phone/ebook reader/game machine/multimedia player/photo/video shooting/GPS navigating/etc device conveniently packet in a small format with quite usable screen and always connected.
Captain Kirk knew it all too well..