I disagree with part of what you're saying.

While having a distinct point of view in art design is extremely important to create an immersive, cohesive and believable world, having high quality graphics is of little value.

MMOs that have focused too heavily on graphics have suffered for it. MMOs benefit more from being accessible to as many players as possible and offering a fun gameplay experience.

For example, WoW has, by many standards some of the poorest graphics on the market, and compensates by having some of the gaming world's most brilliant, fun and immersive art design.