Was considering building a streaming rig around a Mac Mini. I wonder if with these performance enhancements, that will work for me?
Streaming video from camera? In general the newer Mac Minis in general were fine already just because the M-series chips are very fast, but hopefully this should make it much more efficient
Highly depends on what you're streaming. If you stream arcade 2D games of the past, or software development, it should be perfectly fine.
AAA titles with newer graphics, well, you can always send a capture the PC with the nvidia card's screen through a capture card.
Back in my days of streaming, macOS was no option, cca. 2017. Today I'd do it with any M processor mac without a second thought.