If we go with 44.1khz for the DTS cinema projects, it'd have to be PCM as I don't believe DTS-HD MA and True HD like 44.1khz.
Please correct me if I'm wrong.
I'd be ok with a 44.1 and 48 dual inventory release. That or good instructions on how to re sample with good quality.
I'm going to experiment and see if my Oppo 93 can play files muxed with 44.1.
As for the JP test in a real cinema, let's just say I still know a few kind people. :)