So what I had assumed was that the Atmos mix would be an extension of the 5.1 mix (or conversely, the 5.1 mix would be a mixdown of the Atmos mix), but it seems clear that we are getting two distinct and different surround mixes here. This could prove to be interesting. And yes, the Atmos mix may not be as wild and discrete as we would hope, but will at least provide a different perspective than we've ever heard, and you will at least have a choice to go back to a (hopefully) discrete 5.1 DTS-MA mix if that is your preference. This Atmos mix should give some insight into how future Atmos mixes are going to sound if they continue with this model of miking the room at different locations during a stereo playback (like the Kind of Blue mix being discussed elsewhere, for example). It is both encouraging and a little scary.