While it's nothing like 2000, strong earnings have allowed companies to take bigger risks on unproven technologies.

We're being used as a test case, guinea pigs for an unproven technology.

"They draw the line at funding an unproven technology."

Weapons that depend on unproven technology often fail to pass tests.

The question is, Do we invest in future, unproven technology at the expense of upgrading existing systems that work?

In some cases, bidding wars are erupting over unproven technologies.

Obama's missile plan: 'An unproven technology against an uncertain threat'

We don't think we should be wasting money on unproven technology.

In short, it was an expensive and unproven technology.

"Producers aren't looking to invest in unproven technology," he said.