From the article:

The Future of Aviation Advisory Committee (made up of a mix of airline and airport executives, aircraft manufacturers, employee representatives, analysts, academics and one consumer advocate) believes:
1) Small cities will see less competition, fewer seats, higher prices, and more safety issues
2) International routes will see less competition, fewer seats and higher prices
3) Large US cities served by LCCs will continue to have historically low prices
4) Two big cost drivers: rising (and volatile) fuel costs, and environmental costs. The EU "wants to include American airlines in its plan to charge carriers for carbon emissions — a prospect that keeps airline executives awake at night, as it would fundamentally change the cost of air travel."

http://travel.nytimes.com/2010/06/13...tml?ref=travel