dawg,
There are millions of developed .TV sites - MANY way more mainstream than predictions.tv (TNT.tv, U.tv, BBC.tv, etc...). You can browse about 700 I have listed at
Launched.TV - you can also google/yahoo "site:.tv" to see more than you'll be able to look at.
The registry has been around for 10 years, and even though $30 +/- for reg fee seems high to domainers, many ccTLD's cost that much and is nothing to end users. So, even though we're pretty new on the bandwagon, the DOT TV namespace is pretty well developed and will continue to grow leaps and bounds in the mainstream in the coming years.