system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are old films digitally remastered into High Definition?
gpt
"Old films" actually has a higher resolution than for example Blu-ray. You have to remember that these movies were meant to be seen on really large cinema size screens (30 meters aross or more). Putting up a Blu-ray movie on that sized screen would not look good.

So we're actually not making old movies better, we're getting closer to having  the detail they actually have on our home media.