It looks like a better version of minecraft that will probably melt my computer down into slag. Hopefully they keep low system requirements in mind during development; minecraft has benefited greatly from that.

Having assisted some friends in building something similar in technical scope, I'd be pretty surprised if they managed to pare it down to run reasonably. It's a really hard problem.

Minecraft's system requirements remain low because the engine doesn't do a hell of a lot, which is good because it really...can't.