DTS:X certainly seems to be designed to allow more flexible speaker positioning than Atmos.

I'm keen to try Neural:X which is DTS's upsampling algorithm for standard DTS:HD etc. Dolby's version is really good but I'm hoping Neural:X will be even better given the it will be working on DTS's own source material for most BRs

Main system - Sources (Kodi-HTPC, Vero 4k, FireTV, Sat) into Trinnov Altitude 32 (8-16) (+Roon), Trinnov Amplitude 8 amp & Vivid Audio (Giya G3, V1.5) and REL Stentor III speakers. Others: F80 + Raspberry Pi and other Pi systems.