The main downfall with 4K was that 1440p144hz provides better gaming experience than 4K60hz. That advantage is now gone when Ampere is totally capable of 4K120hz across the majority of games.
I have the LG CX 48in and 4K is barely sharp enough, so 1440p is a big no-no (I sit 70cm away from the TV

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DLSS just make 4K120hz more accessible than ever, I mean 2 years ago the 2080Ti was barely capable of 4K60hz and DLSS 1.0 was crap, so who in their right mind would spend 2500usd on 4K144hz screen back then? Also the LG C9 and CX are dirt cheap now, making Ampere and LG OLED a match made in heaven

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And yeah I would choose 4K120hz over 1440p240hz screen every time.