Remastering TOS and TNG was a passion project for the people involved. Other than PIC Season 3, I haven't felt the same amount of passion to the franchise from the people involved. With these people, and with the economics involved in doing the task, I don't think DS9 or VOY will ever get remastered.
The passion is there; it's just a different kind of passion. There's a bit of a difference between the older production personnel being involved in a remaster of Roddenberry and Berman-era Trek, and new people actively producing new shows. For example, LDS isn't my cup of tea because I think a lot of it is juvenile and I don't actually find it funny, but there's no doubt that Mike McMahon had a huge passion about making it.