The .tv extension has been revived by Demand Media and is now widely associated with media/video and television by many, both within the domaining industry and enduser's.
.tv domains are very expensive.
Seemed a good idea at the time, but probably not worth much really.
I think the .tv extension has huge potential to be the #2 player behind .com However I am somewhat worried about how Demand Media is handling the extension. Many people I have spoken with have expressed concerns or questions about their premium pricing.