It will work from a PC or MAC also.
Oh, the impression I got from reading the info/comments on KS is that they don't (yet) have licensing for anything but iOS. The Dirac processing is done on the sending device, not in the headphones. That's why they have their own app for music playback. My understanding is that you can send audio to the headphones from PC/Mac, but not with the Dirac processing. So they
will work from PC or Mac, but not with the Dirac correction.
I'm a bit unclear on whether the app will work on the iPad.