Okay, first, there seems to be some confusion here.
Star Trek television is now controlled by CBS.
Star Trek movies are under the control of Paramount.
CBS has only asked that they do not produce the script. They have not stopped Cawley's fan Trek.
As to how much CBS and Paramount care about the fans... they never really have. There are individuals within the organizations that have cared about the fans and regarded Trek very highly, but as a whole, Star Trek's purpose has always been to make money for them.
Don't forget the days when Paramount began raiding conventions and removing any unlicensed merchandise. Or when Viacom had stepped in and closed every fan site, stating that they could not use any Star Trek image or symbols.
I don't personally see Star Trek as dead. In recent years we've actually seen a bit of a surge in popularity. More and more licensed merchandise is released each year. We've had TOS remastered for Bluray and soon TNG.
Now as far as actually producing new TV shows... who knows what the future will bring. I'm sure it'll be back. Now whether or not it'll be good, remains to be seen.