What might we expect in the coming years price-wise

In the report that was given to the President last summer by his energy Task Force it was noted that there are still a lot of sources of energy, petroleum for example, available but all of the undeveloped ones are very very expensive to get out of the ground and into the market place.

I'd guess that the Siberian reserves fall into this category. Maybe there's enough for another generation or two but the relative prices at that time will have to be a lot higher than now.