Point taken for the sigmoidal curve.
Though I still believe the next 10 will be marked by some drastic changes both in the technologies used and the way to use them.
Think about it, IT is a researching field, where tools are made to improve the making of future tools. The parallel with the phone development is clever, but it doesn't take in account that conputers are made to make computers (when users are done watching the kittens).
There will always be bottlenecks at the end of a technology's life, but there will always be discoveries to do things better, or differently, I'm thinking quantum computing.
Then again, the social factor is enormous. I see things like broadband for mostly everyone and everywhere, with mostly everyone participating and using it, happening really soon.
Anyway it's gonna be interesting.