They’re way cool. But blowers in general aren’t that effective.
The newer high-speed blowers are very effective. (Easier to use than the gimmicky Dyson airblades too.) I can't believe that the concentration of bacterial splatter from any air system would be that great either. Any bathroom is more hygienic without used paper towels spilling out of the trash or on the floor too....
I'd look for funding of such studies by paper corporations....