Good news, oil is worthless! Grab that second Hummer!
I don't think people have realized how deep this recession is. Energy gluts are usually a bad sign for manufacturing. I'm seeing signs that global demand is down.
As long as the world has the population size it is, there will be some demand for energy. There are many tiers to energy consumption, some elastic, a lot of it inelastic.
e.g. an old lady on fixed income may turn down her heat to save $$$, but she's not turning OFF the heat entirely.
Likewise with food production. Tractors use fuel, as do processing plants, and delivering to points of sale.
Sure, a global depression will reduce leisure travel, and luxury goods (ski boats, RVs), but I don't think all of those "wants" are a big enough slice of the energy demand pie.