Look, no one started using candles because it was new and more expensive. No one started using whale oil because it was new and more expensive. No one started using kerosene because it was new and more expensive.
Only now are we proposing to use something because it is new and more expensive. Only in the last generation have we taken something new and LESS expensive, nuke, and MADE it more expensive. Only in the last generation have we MADE oil more expensive.
The www didn't take off because it was new and MORE expensive. It took off when it became economically sensible to do so. That is PERFECT example of government role; infrastructure. Highways, railways, the 'net, space program, military, bridges, etc. The government does NOT do well making cars, trains, guns, or TANG.
When we do things that fly in the face of simple economics, we can't much expect to get off the ground, so to speak. All we need do is look at ethanol, a very new and expensive and stupid idea.