Griff, thanks for finding this article.
It's the first I've seen that seems to offer any better way to go.
Like any "new" idea, there are always questions lingering in the background.
Some are discussed
in the link provided within your article.
The one of greatest concern right now seems to be the US patent
and proprietary aspects of implementation.
Apparently the patent is awaiting US approval, and held by a small company
that may not be able to service the entire industry.
Plus the wait-and-see attitude of the existing fracking companies.
In the meantime the "water-fracking" companies will continue doing what they do.
Cost and potential danger of explosions have to be considered,
but these are routine bean-counter and technical steps along the way.
Again Griff, good catch.