Productivity and Demographics: Was the boom from the boomers?

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In the past decade we've had nice year on year productivity increases. Productivity increases grow the pie -- they're generally a good thing. I'm hoping much of it comes from the application of IT, globalization, etc.

I wonder about demographics though. Over past 10 years the number of workers between the ages of 32 and 47 must have peaked, following the boomer's age path. Now the oldest boomers are almost 60. For knowledge workers productivity probably peaks, for most people, between the ages of 36 and 50. As we boomers move out of that range, will productivity decline?