If you remember "Stranger in a Strange Land" (1960s) set around the year 2000, one of the characters, a reporter I believe, had a mobile phone that was the size of a briefcase. Another character marveled that he must be rather well off because mobile phones were so expensive.
I straight away thought of Kubrik's 2001. The complete failure to imagine mobile phones. Floyd uses a fixed video phone to phone home from the space ship. Personal mobile technology is the thing.
Back nearer the topic: When I can hook my phone up to a monitor and keyboard I'm done.
http://www.ubuntu.com/devices/android