As interactivity comes to the television, user interface designers distinguish between the two foot experience of sitting at a computer and the ten foot experience of watching the living room TV.  The ten foot interface is usually a remote control rather than a keyboard, and interactivity is therefore limited relative to the more user-directed experience of the internet.  But as televisions grow larger, the distinction is more about the desire rather than the ability to interact.  People will always want the passive experience of watching television, but the TV is becoming more and more ready to deliver the full interactivity of the computer.