Source: Gartner August 2013
Way cool chart from Gartner [NOT Gartman!], looking at a variety of technologies within their long term “hype” cycle. Think about Solar or even the internet and you will see how (more or less) accurate this curve is.
The axis plot Expectations over Time, and end up running through the following 5 phases:
2. Inflated Expectations
3. Trough of Disillusionment
4. Slope of Enlightenment
5. Productivity Plateau.
I really like this concept of psychological phases over the course of a cycle . . .
Hat tip memeburns