I would think that specific .tv names would have some value. For instance, things like Channel4.TV, etc. Obviously your target market would be TV stations, or other things related to TV. Maybe something like Sports.TV would have value. Its hard to say.
Thinking as a web geek who is online 12+ hours a day every day, I cannot think of a single .tv domain I've visited recently - even in the past few months....
The bottom line is .com, .net and .org still rule as far as easy to remember, highly valuable domain names. Or put another way, would you rather have:
ComputerStore.com
-or-
ComputerStore.tv
My $0.02.
Take care,
Brian