Starship Polaris wrote:
The wiki entry indicates that "Enterprise" began broadcasting in HD about half-way through season Three.
Still, the whole series was made to be airable in HD from the start. This is because videotape was never used to edit or to do the effects.
As for TNG, DS9 and Voyager: All of the film footage exists. So they could theoretically remaster all of them as well. It may be complicated beyond imagining, but they could do it. I'm forced to wonder, though, why bother remastering TOS if they didn't have ambitions to do the same for those three series?
Perhaps we'll get a 'Remastered Fan Collective' for each series (or one collective comprising all three).