Yes, the non pro (tube) model does pass through Dolby TrueHD and DTS HDMA. I have used it myself for a few months.Does the smaller Nvidia Shield (non pro) pass through Dolby TrueHD and DTS HDMA to the receiver like it's bigger brother? I don't have the space for the pro.
Even the pro version is very small if space is the issue. If you have not seen it, it is smaller than it appears in pictures. Please see some youtube videos.