There are already many ports on Switch that had comparable image quality to PS4 or only slightly worse.
Thats not suprising, because the better the graphics, the less quality you can achieve with more power. Diminishing returns. Thats why Microsoft and Sony both starts with relatively expensive consoles in 2020, otherwise the graphical advantages of the next gen would be almost invisible.
Errrr a game that have comparable IQ to PS4 have nothing to do with diminishing returns.
Switch won't receive any game that have IQ close to SpiderMan, GoW, TLOU2, Ghost of Tsushima, HZD, etc.
The games where the graphic is similar were because that weren't the main focus. But yes this isn't the only game that IQ is close enough to be said that differences aren't of much relevance.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"