I didn't like the game but The Last of Us had the best graphics of the 7th Gen.

On Wii I'd say Mario Galaxy 2.

I think Metroid Other M is the best looking Wii game. True, it was a bit bland in terms of artistic design... but the graphics were absolutely stunning for the console.

On a technical level, TLOU. It wasn't my favorite game either graphically or as a game, though. Personally I'd give it to Ni no Kuni for being a playable Ghibli film.

Best on Wii is definitely SMG.

360, dunno. I was pretty much done with 360 after 2009, and the best looking games I saw on it by that point were Soulcalibur IV and Tales of Vesperia, and ToV, while having nice, colorful cel-shaded graphics, was not in the same league as Halo or Gears.

I'd complete the PS3 list with Uncharted 3 (although I prefer 2 but graphically 3 is superior)

I just want to bring Metroid Prime 3 to the table as one of the Wii’s best visuals contender.

PS3: The last of us, Uncharted 3, Beyond: Two souls, GT6, Ni No Kuni, R&C Future: A crack in time.
X360: Halo 4, Forza Horizon 2
Wii: Mario Galaxy

I completely agree with this.

Thanks for all the answers so far!

By the way, how does Alan Wake looks on Xbox 360? I have the PC version, and I think it still looks really good.

It was a mixed bag, low resolution on the 360 but great lighting when stuff went crazy.

You are totally right! I was going to say Metroid Prime Trilogy.