4K UHD worth it at 9 ft away?

Hi all,

I have a 52" 1080P Samsung from 2010 and it's still going strong. According to RTINGS' TV size and viewing distance guide, the guidelines show that I may not find a difference going to a 55" 4K LED because the distance from the TV to MLP is around 9 ft. It's used mostly for console gaming, (TV, movies, and some PC gaming, hooked up to a gaming PC - smart apps not needed) (no sports). I don't want to go with OLED, because it's hooked up to a PC as a monitor too and am concerned about burn-in. AVR will be the Denon AVR-S750H.

Would it be worth it to upgrade to 4K at the distance I'm at?

If so, which would you get? The Samsung TVs below get decent marks on RTINGS.

1. Samsung 55" Q90T $1200 at Greentoe (2020 model, new, no returns, 1 HDMI 2.1 port)
2. Samsung 55" QN90A $1500 + $100 GC at Best Buy (2021 model, mini-LED FALD, new, returnable, 1 HDMI 2.1 port)
3. Other suggestions?

Thanks!