One effect is that we rely on the Middle East too much. That part of the world is in chaos, and we would still care but not as much. Our economy becomes tied to groups that want to knock each other, and the United States, off the map.
The "current" power crisis is actually one that we have known about for some time, and that is the fact that the demand for energy is higher than the available supply. One could argue that there are actually both positive and negative effects from this. The most obvious negative effect of course is a financial one.
Financial effects: whenever the demand for something is higher than the supply, the price of the desired good raises. This means that as the oil supply (for example) decreases, the cost of oil will go up. This in turn effects the price of gasoline, which effects the cost of shipping, traveling, etc.
On the other hand, there have been many positive things that have come out of the knowledge of this crisis. Awareness has caused us to be more creative about preserving energy. Technology such as the Internet has helped reduce the need for the Postal Service. In addition, there is a major trend in commerce and economics right now to "go green." This is not only helping to preserve energy, but reducing waste. When gas prices rose so dramatically a few years ago, several people made lifestyle changes in order to save money. As a result, they preserved energy.
Even the media is making enormous strides to promote conservation over consumption and waste. Consider "The Biggest Loser" promotion to use filtered water and re-usable water bottles. Consider the number of celebrities taking platforms in promoting "Green living."
I, for one, believe this is something humans should have been considering all along, but it has taken a "crisis" to get us to think about it and really start to act. In this way, the energy crisis could almost be considered more positive than negative.