I think you all make good points. There are discussions to be had on the the comparative pros and cons of microperf and weaves. I have favored weaves such as SMX, Seymour, and Dragonfly for their acoustic benefits, mild gain, and fine texture which is invisible beyond about 8'. Even their 2K versions have far more and smaller openings per square unit than microperf. Microperfs can be seen farther away than the mentioned weaves.
There is plenty of evidence around over the years that microperf has acoustic issues, and weaves have few. Would we all find those microperf issues overwhelming or even noticable? I just don't have a ton of experience with microperf.
The gain coating
I actually have a source for a microperf 2.2 to 2.4 gain screen material. It is even approved for RealD passive 3D. I have never gone that path due to the issues above, and my preference for very good uniformity arcross the viewing area...plus the price being over $7K for a 125" wide 2.35AR screen.