TV isn't going away....
...but I predict it will change immensely in a few years.
Already, I have a MythTV machine, which records all the broadcast shows I might want, and is more than capable of playing anything I might happen to bittorrent.
Just imagine when 100MBps+ broadband becomes widespread-- folks might opt to purchase subscriptions to the shows they enjoy, much like magazine subscriptions are now. Of course, there will also be sharing and copying, but if the subscription prices were reasonable (say, $30 a year for House or The Shield) I can see a lot of my customers who are currently struggling with the technical complexities of bittorrent jump to a subscription model in a heartbeat. Especially if all they had to do was buy a standalone component, similar to a DVD player.
The technology is functional now, and the first company to, say, license the Slingbox and build it directly into a modern TV will push it over the edge. Why would anyone willingly use broadcast, if their neighbor has a TV which records what they want, skips commercials, and allows downloading? FFS, I could build a device just like that now, if it weren't for the massive amounts of patents I'd violate. This isn't an issue for the likes of Sony or JVC, though. I'm certain they have folks who can recognize the competitive advantage that such a device would give them, making it more than worth licensing the pertinent technologies.
As soon as such a device becomes widespread, the television ad market will entirely collapse, in much the same way that the theatre behemoths did in the 1940s.
Without advertising revenue to support the production of entertainment (and I imagine that a season of The Shield is expensive to make), the networks will be forced to move to a subscription model or be strangled of funds.
The analog to digital back to analog process (And not web 2.0) will ultimately be one of the most momentous social changes humanity has ever seen.
TV isn't dying, it's evolving.