The future of transportation?

I was watching a documentary on hybrid cars and how they are important to our future as it will extend the usage of petroleum for us. But then I thought, what about planes? There are no great advancements in plane technology that greatly reduces the need for petroleum and thus, we will not have any method to fly once we run out of petrol. 

This will impact how we do business and the manufacturing of products. Will it change our industries back 50 years? I am not sure, but it is something interesting to think about... what will happen to the aviation industry once we run low on petrol. And also the rise of the ship industry as we move towards high tech boats to travel and trade in. 

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