I’ve seen a provision for Auro 3D support inside Nuendo 6.5, but no Dolby Atmos support.
More the VST Auro-3D plugin is not yet available, so the Nuendo Auro-3D provision is useless right now.
Auro 3D is not yet a very common format. Dolby Atmos is more supported, and seems to me technically superior because it does allow to virtualize the 3D audio mix from the reproduction channels.
According to Wikipedia :
For pro theaters, as of december 2014 there is only 550 Auro-3D installations, and as of february 2015 there is about 2000 Dolby Atmos installations.
For home theaters, Auro 3D is only available on Denon receivers as an expensive paied add on, when Dolby Atmos is here as default starting on the AVR-X4100W receiver.
I can confirm that it is possible to watch Dolby Atmos movies in a home theater, as i tried this myself. It’s not complicated at all. Just add a couple height speakers and it’s ok. No need for a new blu ray player, just disable the stream filter so that the raw audio stream is passed to the HDMI output.
There is no Auro 3D video blu ray, when there are a few Dolby Atmos blu ray right now.
The benefit of 3D surround formats is not questionable. It really does add a surround experience that give you a better immersion in the movie.
Hopefully we’ll see a 3D panner inside Nuendo 7 so that we can start to experiment and produce 3D mixes.
Even if the Atmos encoder is not available now, a discrete 3D panner implementation would allow to start experimenting with 3D mixing.
Protools does have it.