The article is 5 plus years old, and you'd think that if the proposal was deemed viable that someone would have "blown their trumpet" in recent times.
Perhaps people are waiting for the patent to run out. Perhaps there wasn't strong enough financial incentive to switch. What did it take to make AF et al to be motivated to change out pitot tubes which on a per aircraft basis is "chump change."
The technology to implement this concept has to be getting easier and easier to implement. Wouldn't be surprised if the Chinese are using the technology on their latest fighters
.