I remember the Hi-Fi tracks from old VHS tapes like Braveheart, Outbreak, and even the GOUT sounding pretty awesome for what they were, so long as the tape is in good shape.
The idea of having AC3/DTS/PCM LaserDiscs tracks to sync to Blu-ray makes me happy.
But let's be careful to still evaluate and not assume just because it's LaserDisc that it is better. GoldenEye's AC3 LaserDisc track has bloated LFE, which was fixed on the DTS LD. I always felt the PCM track for the Lion King was better than its AC3 track. Forrest Gump's AC3 track always confused me: the surrounds don't seem to be active at all (unless that is by design). Early DTS titles, including both JP and Apollo 13 had levels set incorrectly for the LFE and Surrounds.
That being said...I'll still take a LD track of a catalog title over most Blu-rays and almost any DVD out there.