Its definitely the PC build. All of these "public" builds are running on pcs.
Nintendo must be keeping these guys shut on wiiu details because its coming like in a year.@Hisiru
They were interviewed some time ago and couldnt even say if the U version would support all the effects. Im not sure if you have already seen it, but this a list of exclusive features of the wiiu versionviewtopic.php?f=4&t=83257