You can't compare MMORPG to FPS ...
Why ?
MMORPG is a lot more complicated and there are thousands of ppl playing it at the same time , not just 1 or 8-16 in multiplayer.
It is totally different type of game.
Did you ever seen reviews like " Command & Conquer has terrible graphics after all because CoD4 looks better ".
Now try to compare it this way, crysis in comparison to CoD4 and other similar titles doesnt look that much better, they're on fairly same level.
Now compare Age of Conan to other mmorpgs ? totally different legaue, no competition at all.
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And even after all of that I wouldnt say it looks better, tell me, did you play high level content on all maxed out ? And keep in mind that's not even DX10 enabled yet...