All things being equal DLSS transformer model really pushes past the narrative that 4k isn't worth it because 1440p has so much higher fps

In practice the oled 4k's are so expensive you probably get a better experience within a reasonable budget buying a 360hz 1440p oled over a affordable 4k ips

As things stand you're looking to spend 2k € for the gpu and oled monitor together for the great 4k experience if you go with 5070 ti and an oled monitor.
5070 + a 1440p oled might cost you 1.3k €