You'll never completely eliminate air travel. Look at Europe today.
On the other hand, what's wrong with creating a robust high speed rail system on the US from KC to NYC through major metro areas of IND/ORD/CLE/PIT/the NE corridor, FL corridor, NE corridor? Would an efficient, affordable high speed rail eliminate some aviation jobs? Absolutely. But what's wrong with making the lives of people better? High speed rail revolutionized the Japanese economy. They have already successfully test a maglev system that will travel at nearly 350mph. We are the biggest economy in the world and the best we can do is the Acela between a few cities in the NE?