Another facet that perhaps has occurred in Big Oil's crystal ball is the advancements being made in Li-ion battery technology. I just finished reading an article in Car and Driver's May 2011 edition. It said.
"A123 is aimed at optimizing the battery's power, energy, and life through the use of nanostructured materials that provide a high surface-area-to-volume ratio. Experimental solid-state (also known as thin-film) cells increase the surface area even more. The potential energy density of these micron-thin ribbons is four-to-five times that of today's Li-ion batteries. As with integrated-circuit manufacturing, the cell materials are deposited one thin layer at a time in a vacuum. The result is an incredibly light, dense cell."
The end result is that you could well see, as someone already has said, they are starting to see themselves in the energy business, not just the oil business. Photovoltaic recharging stations would make sense. However, when we get to 300 to 400 mile/charge batteries I would suggest that some large motel chains start thinking of getting on board with overnight charging stations for their customers with some amount added to your bill for the amount of kWh you consumed overnight. The wait-and-see of that is to follow some of the developments in fast charging batteries without degrading them excessively.