at least when it comes to consumer tech
like i can't even remember the last time i was excited for a new tech thing. maybe my second smart phone, i guess? that one was at least a big improvement from my first one. third was marginally better, and then the fourth, which i'm using now, i feel like i only got because of planned obsolescence (slow down/battery problems etc.)
it's such a stark contrast from growing up in the 90s/early 2000s
4k is definitely worth it, if you crank your FOV and play old games at locked high framerates (120-244hz) or with G-sync/Freesync enabled it's almost like having a 1080p gaming setup with 9 monitors and super immersive since you can't see the pixels or screen-door effect anymore
Most console games also still use variable resolution to accommodate new shaders, I don't think it's worth it because so many shaders are temporal and smear. If you play an old game at locked 4k and locked max framerate (and especially black frame insertion at low latency) it's awesome.