Low intensity ultrasonic shocks have helped heal wounds by stimulating new blood vessel growth, so the next thing was for some dude to try it out on his dick and presto!
To put it in perspective, when high intensity ultrasonic shockwaves were found to break up kidney stones (lithotripsy), it was thought to be the perfect treatment, but then side effects like tissue scarring started to show up. Lithotripsy is still usually better than surgery, but not without its own set of problems.
So be wary.
This treatment is real and makes sense for those men with cardiovascular disease where the pills no longer work, but watch out for the hype and exaggerated claims.