Poltergeist on 4k - still enjoyable after all these years. Picture quality is pretty good, though it seems like in older films, panoramic shots don't have the clarity you'd expect of a more modern film. There's the odd duff scene in terms of quality, but it's pretty good.
When I first read about HDR I thought it was another new thing to make people feel the need to shell out for a new set, but in older films it adds every bit as much as the higher resolution. The flickering TV is unnerving, and there's the odd detail that just shines through as something you haven't seen before - such as the lamp shade above the table when the family and investigators are sitting and talking in the semi-darkness.
Poltergeist looks great in 4K. Nowadays we’re used to pristine looking films with no grain due to digital capture, is great - makes you feel good about the TV you bought! And they seem to come across well on streaming platforms. Movies captured on film relied on skill (much like using an old SLR film camera rather than a digital camera) to set the camera settings correct, and this is usually the reason for the odd scene to look a bit rough or overly grainy. I always remember the library scene in Ghostbuster (1 or 2?), where the camera moved slowly down the isle, with the fluorescent lights above every 10 feet or so. The picture looked great underneath the light, but when the camera moved into the darker areas between the lights, the picture went grainy. Certain lenses on film cameras produced different looks, and you’d find that certain parts of the picture weren’t in focus. This is evident on Close Encounters.
After watching so many films over the last few years, I prefer to watch films captured on film rather than digital. It’s almost like the digital vs vinyl debate - digital capture looks flawless, whereas film almost creates a character that’s part of the film itself. You’ll see some film directors like Tarantino still use film rather than digital.
I originally moved to Bluray for the picture quality, but I ended up being more impressed with the sound quality improvement. I also moved to 4K for the picture quality, but it was HDR/Dolby Vision I’ve been more impressed with. When someone is shining a torch around in the dark and it catches direct line of the camera, it makes you blink or close your eyes. One of the first few HDR films I watched was Bad Times At The El Royale. The scene where Billy Lee walks up to ‘Boots’ on the beach, you can’t see his face as the sun is directly behind him - as soon as that happened, I did exactly what the girl did, and put my hand up to block the sun to see who it was!
That and Atmos/DTS:X - these sound formats sound better than Dolby TrueHD and DTS Master Audio.