I don't know if it's the best looking game on the system, in my opinion that title still belongs to Breath of the Wild, but it's close enough. It manages to look reasonably detailed while still maintaining a crisp image, it looks very sharp on docked mode. There are games that surely manage higher polygon counts (I think), like the DOOM games and Wolfenstein II, but look bad because they're blurry as hell.
My bet with The_Liquid_Laser: I think the Switch won't surpass the PS2 as the best selling system of all time. If it does, I'll play a game of a list that The_Liquid_Laser will provide, I will have to play it for 50 hours or complete it, whatever comes first.