The one idea is the good one - open source low cost. But, I doubt this initiative will be widely used. There are now so many Pi-based (some tinker) solutions out there doing ADS-B (Stratux, Openflightbox, Pilotaware with a similar system ...) jumping on the same and there are now the small Echo devices from uavionix.
My prognosis and a little hope, if politicians finally wake up - after all they will adopt UAT, if they stay that deaf and dump - we get our own European system in 20 years with 10 percent functionality of todays US infrastructure.