Check this article - while this is known to quite a few of us, the article tells how it is changing people's lives.
A parallel universe to TV and Film
In an extreme scenario, this will make TV irrelevant. But not so soon....TV has a penetration that is far unsurpassed by any other communication device yet produced on this planet. And transmission has reached a huge number of people which gets news, information and entertainment to a majority of people. Internet is still far off.
But soon enough communication world will merge these devices. And check this, naturally TV is bound become one of the devices on which the new communication technology will bring its magic miracles on it.