The reason we won't see TV Trek is because it doesn't fit into CBS's TV strategy.
Evidently, it doesn't fit anyone's TV strategy. As CBS television is more than capable of making it for consumption on another network or cable outlet.
If anyone was interested.
Except that is happening less and less often. CBS Television Studios does not produce any show not airing on a CBS owned station. And the same goes for most other TV production studios with the possible exception of WB(which doesn't have a great broadcast network option).
You can't justify Trek TV using old business models. Convince CBS they can make money on Trek TV now and going forward, not 10 years ago, and then you'll have a chance to see Trek on TV.