Yes, it does show IMAX DTS + Neural:X. You have to cycle through the settings on the 4500. Also you have to make sure you have the DTS setting on the movie itself. I had to play with the TV settings to get any sound of the app at first.
H/T: Marantz 7702MK II, MM8077, MM7055, Triton 2s, SCXL, SL/SR-S50s, BL/BR-S50s, H/W-4 Sat3s, dual SB16 Ultras, JVC DLA-RS2000, Stewart Cima Neve 110", Tivo Bolt, PS-3, Apple 4K TV, GIK Acoustics treatments, Panasonic UB820
Gameroom: Denon AVR-X4500H, Emotiva 2-T1’s, C1, 2 B2’s, 4 NHT ceiling speakers, 2 Velo SPL-1000R, Sony XBR85X900F, PS4 Pro, Tivo Bolt,Oppo 203