Teletext is the only exception to the general rule that TV based information services (interactive TV) don't get popular adoption. However it has to be remember

Teletext is the only exception to the general rule that TV based information services (interactive TV) don't get popular adoption. However it has to be remembered that in its day it was the ONLY live information service people had access to. Even rolling news was not available for most people. The reasons interactive TV doesn't usually take off is because at a distance interaction via a remote control isn't a pleasant experience and the TV is a shared display whereas the interaction is usually a solitary experience. Services where you can navigate to video/photo content is different category and can be popular if the content is good. Games are another different category that can be a social experience and the challenge of mastering the controls is part of the experience not a barrier (in good games anyway).