Drilling and fracking technology. Compare the boom to how Standard Oil came about during the Pennsylvania oil boom or how "insert major oil name here" was founded on consolidating Texas wildcatters.
Small players who have access to the oil finds due to new technologies will produce when it is profitable to do so. The do not have the high capital budgeting hurdles of big oil. Strangely, big oil didn't consolidate that much during the crash....Perhaps, barriers to entry really have been affected severely.
Starbucks will need to close up some shops in S.F and open up in the Dakotas.