Xenon, I would agree if we are only talking about resolution. However a lot of 4K TV offer the high dynamic range and increased color depth (HDR10 and/or Dolby Vision) that 1080P sets don't. This gives a performance increase that is easily visible at all normal viewing distances.
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975/7075/SMS-1
Aperion Verus Grand Towers & Bookshelves, Verus Forte Center, Infinity Surrounds, Ultra-X12
Oppo BDP-203, XBOX360, Xbox One
LG 65" OLED
RR2150 w/Klipsch SCR-2