It'll be interesting to see the extent to which this ends up being good or bad. In direct economic terms, most likely good: lower energy prices make some industries more competitive, and direct fuel exports (like any commodity export) are a source of income. On the other hand, technological advancements tend to come from constraints, so the U.S. could be setting itself up for 10-30 years of easy living on cheap oil/gas, but fall behind places like Europe, or perhaps even Asia, on R&D and production of more energy-efficient technologies, or other sources of power generation, which might eventually turn out to be important. Hard to say.