Most of the writing you see about the economy speaks to narrow questions: What will growth be this year? When will the unemployment rate get back to normal? And so on. But the things that will determine standards of living a generation from now have almost nothing to do with this month's jobs report or the Federal Reserve's latest policy meeting. Those determinants, instead, depend on companies' innovations — in particular, whether those innovations turn out to have major economic consequences.

Researchers at the McKinsey Global Institute, the in-house think tank of the giant consulting firm, have a new study in which they have taken their best shot at predicting exactly that. They have scoured the range of potential disruptive technologies and done their best to estimate how transformative each might be for the U.S. economy. Their results are hardly definitive — we can't know what the future holds — but they represent a serious effort by some smart people to quantify what appear to be some major forces shaping our technological future. And the results have some important implications for how we think about innovation.

First, the researchers, led by James Manyika, narrowed their focus to technologies that are already advancing rapidly (no pure pie-in-the-sky stuff), have broad potential impact (not something that would just affect one or two industries) and could have significant economic impact (the total numbers are large). Not making the cut were technologies that are unlikely to be available between now and 2025 (fusion power, for example) and those that are coming to fruition but are niche products (such as private spaceflight).