Hi @tallscott7,
Also interested in this. I have an m3 mbp that I was doing some tests with and, it looks like perform windows (and tops in general) clamp displayed output at 1.0.
I did some digging on the forum and found this post from 2021 with some notes from @malcolm that seems highly relevant:
10bit (hdr) workflow - General TouchDesigner Discussion - TouchDesigner forum (derivative.ca)
I’m not sure if there has been more movement on this recently, but there are other threads where there has been mention of highly focused development in color space management in TD.