viewer or user
the TV viewer is fundamentally passive not stupid
basically TV is a one to many experience
the TV hardware is not a swap out market
- average TV RX lifetime is ᡅ years
- average PC lifetime may be ɚ years
time spent viewing is relatively static
- must be awake to count … !
use of teletext is a fraction of viewing time
- mainly non-TV program related data
- certain groups are known to be info hungry