In Cable Vs. The Unknown Shelly Palmer posts the results of an SMS survey from a session called "Add Cable and Stir: A Recipe for Business Success." The results, as posted on his site, are:
Municipal Wi-Fi–10 percent
Something not yet invented–25 percent
Given I really like visuals and with Google garnering zero percent it just didn’t have the impact without a visual. So here is a quick pie chart on the perception of threats to cable television. Note the line on the lower left that represents a perception of zero threat from Google.