Is there any historical data for comparison purposes?
Do Gartner have any inflation-adjusted numbers to compare spending to eg 15 years ago, when the equivalent services were something like magazine subscriptions and video/game rental clubs?
I'd be intrigued to see how it compares. At a guess the total expenditure per head would be much lower due if nothing else to information bottlenecks and the pain in the ass factor involved with going to the rental shop and having to deal with physical media.