I dunno man, I think the more realistic a game looks the more it looks like ass. I think WoD looks gorgeous and frankly a good art direction is better than high quality realistic graphics. Most of those games that looked realistic back in 2004 looked like garbage by 2006 while WoW still looks great, albeit, some of the older skins in older zones are a bit rough becasue they were not built using the more modern techniques used fro MoP/WoD. If you are going purely on graphics then of course WoW is behind the times and will never look as good as the new stuff, but with the style and art direction they chose for WoW, it will look good for ever.
Also, to appeal to as many people as possible it needs to run on a wide range of PCs. If you take any of the games you linked and applied it to WoW, you would easily lose 1/2 to 2/3s of its players based on PC specs along.