The lack of commitment was no willingness to pay the operating cost.  Nothing operates 100% of the time in Alaska. Boats (hovercraft) have to deal with sea conditions; aircraft deal with weather issues.  This plan is based on a fallacy that the road will always be usable and aircraft will always be able to fly into Cold Bay.  There are no absolutes in Alaska when it comes to either of those two concepts.
Helicopter pilots claim the are more times when a chopper can get into and out of a location -- Cold Bay or King Cove -- than a fixed wing aircraft.  That alternative does not seem to be getting consideration. Although it might not be any more cost effective or dependable than the hovercraft or the proposed road.