I just found this, so not sure it is the same as Atmos DVD, but appears it processes it as long as you send it bitstream. We currently use Ps3 which is in bitstream mode to let my Denon process the encoding.
"For the most part, any Blu-ray player that supports Dolby TrueHD and bitstreamed output should support Dolby Atmos. Dolby is wrapping up the Atmos "objects" (the height information) into a Dolby TrueHD wrapper that works with existing players and receivers. When you send that Dolby TrueHD soundtrack out over HDMI to a Dolby Atmos-capable receiver or processor in bitstream mode, the receiver or processor detects that it is actually a Dolby Atmos track and processes the sound accordingly. "
