I fear for 4k Disks...

[dubious]

Originally Posted by Geoff D

A well-mastered DVD on a correctly calibrated 4K display is still exceedingly watchable IMO, but I've even had old non-anamorphic DVDs up on it and they were surprisingly tolerable.

I draw the line at laserdisc though, there's just not enough resolution there when zoomed in and the chroma noise and other artefacts make viewing a chore rather than a pleasure.

Laserdisc can look alright depending on how well it was mastered, condition of the disc, and video processors in your playback chain.

Also, ripping them, deinterlacing, and scaling down the resolution a touch can help eliminate visual artifacts. It'll never look as good as newer dvds, but can look better than some SD DTV streams.