I like steam power myself, but even I think returning to steam won't happen. Sorry but the problem is cost. Sure steam is swell and all but when maintenance comes into play a more modern diesel electric from General Electric or Electro Motive Diesel would just be better for handling more modern passenger and freight trains. Some railroads like Burlington Northern Santa Fe are trying new fuel sources to power diesels. Now, don't get me wrong. Steam is great power, but the conversion from steam to diesel was what the railroads saw as an answer to bring costs down, 'cause when the Interstate Highway System was created the railroads started losing dough (money). They couldn't keep up with the changing affect on the railroads. If diesels didn't came around, steam locomotives would have bankrupted the railroads. Sure, I'd love to see Pere Marquette 1225 take a freight train for CSX Transportation, but the world is at a faster pace than it was 50 or 60 years ago. So, it's best that they keep taking excursions and besides that...steam locomotives require more serving facilities like water and coaling towers. Diesels only need refueling hubs so they can pick up fuel and go. Many diesels can pull one or two trains without refueling, so diesels are better to that degree. But, we can't change history. Mankind wants to move forward, not backwards so dieselization was in a sense a good thing.