Seems to me that the short term low prices will not persuade corporations from the continued search for a cleaner burning fuel that is cheaper to produce. The Saudi's will keep driving the price of oil down until fracking is not economical. When drilling wells are shut down, up the price will go. If we see $60 a barrel oil, you will see domestic drilling slow down quickly.
I Don't think short term will be an issue as long as new customers that operate machinery in enclosed warehouses that use batteries convert over to hydrogen cells. In the longer term, hydrogen cells could slowly take over as the answer to alternative fuel instead of oil. That is just a thought based on watching YouTube and the people out there now working on methods to run engines off straight hydrogen. There are claims of no internal damage to the engines when compared to the same applications with gasoline fuel. Then of course, no fumes or pollution is the big advantage.