First of, fjtorres WTF, how did I miss that entire show? cool, something to look forward to.
One device is where it's heading, just think what the PC did (Your TV, HIFI, Video Recorder, File storage, mail, Photo Album, etc...)
Tech is not there yet, so screen size and battery are issues at present. But I believe in the future the
one device will just be your "Account" whether that be with Google or Microsoft or Skynet, is openn to debate
You will have one device in you home, some box in the basement, connected to fibre or future wifi, with x amount of storage, it will be used for local storage, personal stuff and as a buffer for you cloud account.
The way you will actually get the data will be glasses, wearable, as this needs the least amount of power and screen real estate, while giving you the best view.
IMO