Sorry, I didn't see this as it appears your comment was included within my quote above.
It looks like your comment was:
"Rod, I have a suspicion that Bryston will in the future release a software upgrade to the SP4 allowing it to play 192/24 hi res material. I believe when the SP3 was originally released, it was limited to PCM 96/24 and later software upgraded to 192/24."
We'll certainly get that via an add on module as James has indicated (not sure about 192/24 but I certainly expect 96/24) however I suspect that will be limited to 2 channel only and possibly Dirac wouldn't even be able to be applied. I'm not sure how much actual above 96/24 multi-channel content is out there so that may be a moot point but there is certainly plenty of 96/24 multi-channel content.
I'm not sure this could be done via firmware though. I suspect it's a hardware limitation, perhaps Bryston could chime in on if it's possible to do via firmware or would require more DSP horsepower.
I know 96/24 with Dirac and Atmos/dts:X/Auro can certainly be done via DSP's as that's what the Theta and Datasat units run at but I'm not sure about 192/24 as only the Trinnov Altitude32 (and not the Altitude16) can do that but it's not DSP based, it's an Intel Pentium i7 (the Altitude16 is an i5 I believe). I asked Emotiva what their new unit will run at internally but they wouldn't disclose that until the unit is released. Since it's also a Dirac unit it will be a valid comparison to determine if Storm/Bryston are behind the 8 ball on the technology/infrastructure side or if say the Emotiva ends up only running at 48/24 then it may just be a design choice/cost saving decision.
The SP4 is considerably cheaper than the Trinnov Altitude and Theta Casablanca but I believe very in-line with the Datasat LS10. It'll probably be more expensive than the Emotiva RMC-1 based on Emotiva's pricing models.