Extraction cost for shale oil will fall as the technology matures.
The cure for high prices is high prices.
Innovation is the path to riches. Finding a way to do it cheaper will lower cost as it always has.
Fracking is a mature technology. It has been in commercial use since 1950. That there is going to be a real breakthrough in a 75 year old technology that halves the cost from here is just an appeal to hope. And even if that breakthrough comes to pass, you still have to find another 5 fields of the same size to cover the 3% year over year GDP growth for the next 40 years that we all need just to stave of system collapse.