The fact that the ability to make mask with coatings like iridium has existed for quite some time, but has not caught on to any degree, based on the plethora of mask brands/models for sale and in use throughout the world that do not have this feature, should tell you something.
If you think it is cool and would be useful, then buy one....then post a review about your experience, either positive or negative. A little over a year ago there was a dryglove system I wanted to know more about (fourth element ellipse) but there was not much info other than ad copy available. I sprung for a couple of sets (for me and my wife), dived with them and posted a review....in the end I didn't like them and have traded one set to someone who was interested in them.
Cheers.
-Z