For what it's worth, one of the guys from The Digital Bits (who usually are in the know on such things) says:
Farscape was shot on 35mm film at 25fps, and season 4 was shot on HD video cameras
So season 4 is no problem for Blu-Ray... I know if it'd been shot on video, we'd have the same problem as TNG, but I don't' know anything about 35mm as far as HD transfers go. Anyone know?