Two years ago, just as the pandemic was taking hold, someone said to wait two or three years.
But why?
If you have a 4k tv, why deny yourself the best quality picture and sound? Did the person telling you to wait think 4k blu ray would fail? It's hardly set the world alight, and it's true many movies aren't 'real' 4k, but that means you should use your brain and not assume just because it is a UHD disc that it's worth upgrading. Of course, if you don't have the movie, it's very likely worth buying the 4k disc, although there are some movies that I think look better on blu ray, because now they can digitally tint or add HDR/Dolby Vision tweaks I sometimes think the blu ray looks more natural. Of course there is Dolby Atmos sound too...
I only moved to 4k in 2021. I'd been waiting for 3D to make a comeback, and when it didn't, I bought a used 3D OLED on ebay. I haven't abandoned 3D!!
The 4k player was next, and I already had some 4k movies, from steelbooks I'd bought. I'm selling off some of my 4K discs, but I'm keeping many, regardless of whether they are real or fake 4k. A 2K upscale in theory should still look better than a 1080p upscale.
Unfortunately 4k discs AREN'T region free.
When it comes to regional restrictions, the good news is 4K Blu-ray discs have just one region code: worldwide. Essentially, they’re region-free. They can be played on any 4K player, in any part of the world.
So why are Death Wish (2018) and Greenland (Nordic release) and Outpost (USA) region locked? Admittedly only 4 discs are known to be region locked at the moment, but the possibility is there.