From drones to wearable technology to Hyperloop pods that can potentially travel more than seven hundred miles per hour, we're fascinated with new products and technologies that seem to come straight out of science fiction. But, innovations are not only fascinating, they're polarizing, as, all too quickly, skepticism regarding their commercial viability starts to creep in. And while fortunes depend on people's ability to properly assess their prospects for success, no one can really agree on how to do it, especially for truly radical new products and services.

In Innovation Equity,...