Display type matters a lot, a good 1080p plasma will still look better than many 4K mid to low range you can buy now. Right now, OLEDs are the best for picture quality, however, in terms of pc monitors you want to avoid them if you mostly do office work, so not always clean cut.
In terms of PC gaming, it really depends on what you put value on; frame rate, resolution or saving power/money. 4k does look better than lower res, but is it worth it to you personally with the trade-offs?
When it comes to 4k streaming, it is better than 1080p streaming, but that has more to do with how awful 1080p bitrates are for places like netflix. The reality is, Blu-ray movies (not 4k Blu-ray) have a higher bitrate than any streaming service has for 4k videos, and only Apple can come close to it, with 30Mbps content. But this is all streamers being cheap and cutting costs.
4K Blu-ray discs are a good step up on Blu-ray. However, a lot of it has to do with HDR rather than just pure resolution. The reality is, most movies for the past 20+ years have been mastered at 2k, and most cgi work was also done at 2k res, so only so much you can do to make the footage look better, if you don't go the very expensive route of rebuilding the film from the raw footage. Now an older movie shot and edited on film, and given a good remaster, it will look miles better than the old Blu-ray. But on the same note, lot of Blu-Rays still look really good, and so got to ask yourself if the upgrade worth it.
I won't say 4k is as big leap over 1080p, them 1080p was over 720. But as long as display is an improvement over what ever 1080p screen you have, you should see the difference.
But got to say no idea what the OP is going on about text, on system level very easy to change that, and personally never had a issue reading in game text at 4k anyway.
Every bluray I've seen that prides itself on being 4K is actually just 1080p if you read the stats on the back. What's up with that?
That's because those are blu rays that can only do 1080p, rather than 4k blu rays which is a different format. Just lot of masters are done at 4k or higher resolutions because it will create a better picture even when you downscaled it for the 1080p blu ray. Same thing on 4k blu rays, where some movies are mastered at 6k or 8k.
