yes and not 
i have test some trace DTS:X bitstream with my onkyo nr 818 and ti work like DTS-HD without problem so:
DTS:X -> DTS-HD with old AV reciver
DTS:X ->
must be wait 2016 A/V reciver 
What do you mean with "waiting of 2016 AV receiver"?
My receiver has support.
I ask because, Dolby Atmos support has similar problem with previous software versions i.e. the player tries to do something when it bitstream the audio.
My old player has no problems with Atmos when it came on the market (Transformers: Age of Extinction) - it's software wasn't changed a year. It simply bitstream the audio and the older receiver say "Dolby TrueHD 7.1"
And that's why I was wondering that is it the same problem with DTS:X?
Regards