Looks good, though folks need to realize that art styles are relative.
That, and the extremely stylized, painterly style these Rayman games are using isn't ideal for all games. These games have very loose, forgiving platforming. Essentially everything is humongous super sized to account for the irregular, impressionistic visuals.
People should just be happy that games with a variety of styles are being made, instead of all of one thing. I get the impression that some who don't think it through would want every single platformer, for instance, to just use Rayman's graphic set.
Best looking game ever? Good god no. What the? Best looking Rayman game ever? Yep.
People have an extremely difficult time separating art and end effect from technology.
"Best looking ever" is usually taken to literally mean the most advanced display of technology, etc. Rayman Origins and Legends are technologically simple compared to many games. Likewise, plenty of games using advanced and expensive tech get fawned over as 'best ever' when they have dull or uninteresting art, design, etc.
There is no best looking game ever. There are too many ways in which a game may looking appealing. A more logical observation might be that these Rayman games may have the best execution of this style of visuals so far in a video game. They are the best in their class.