If so, this shows that you can develop amazing logic/graphic wise games with JAVA. I think this should be used as an example when people ask about games developed in java instead of just mincraft and runescape.
closed as off topic by Sam Hocevar, bummzack, Byte56♦, John McDonald, Ali.S Sep 6 '12 at 21:11
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I'm not sure if this is some kind of weakly disguised advertising, but a quick googling says yes, Wakfu seems to be written in Java. But while it looks very nice, I don't see anything "amazing" with regard to Java or technology in general. I've only seen the trailer now and not played myself, but Minecraft seems to still be far more complex with regard to game logic - just think about the terrain generation alone. A crafting system, enemy AI, fluid spreading, day/night cycle, lighting, portals and all that won't create themselves either.
From a grahpic point of view, Minecraft doesn't have too much to show, but Wakfu seems to be made up of pretty drawn sprites and tiles, which has nothing to do with the programming language or even the engine, but more with the artists and their tools.
A game will look as good as the artwork, animations, shaders and stuff you put into it, and as long as we're not talking about really high end, GPU melting games like Crysis, I don't see why Java shouldn't be able to do it. It's the same misconception a lot of people have about specific engines: Unreal Engine 3 doesn't automatically make your game look good and a free engine doesn't automatically look bad.