Even the staid Nielsen ratings standards have finally announced plans to include online streaming audiences in their metrics starting this fall. Now after years of talk about “cord-cutting” and the collapse of TV as we know it, a new report is suggesting that the rapid growth of the online audiences will fundamentally change not only the way viewers approach video content, but the way that advertisers do.

The report, titled “Global Video Index: 2012 Year in Review,” was released by Ooyala, a California-based company that specializes in online video and online video analytics. It found that the amount of video watched on tablet devices and mobile phones in 2012 increased by 100 percent over the previous year, and also that advertisers are taking notice of the shift to online video viewership, with U.S. ad spending on streaming video content climbing 46 percent to reach $2.93 billion last year alone.