I love the public bathroom Dyson thingies. They kinda became a standard for me now, love how quickly they dry hands. Way better than paper, towels or weak fans.
But yeah, the other stuff is a bit gimmicky.
As I recall, one of the selling features of the Dyson Airblade is that it has a HEPA filter built-in.
Paper is actually really effective, but only if you use it properly (don't crumple, always fold in 2, and wipe). 1 small piece is actually enough for both hands unless they are still dripping water.
The old design would just push your hands into one side or the other, where the bacteria-laced water from the last person still remained.