I noticed this chart on c/net yesterday. The article was talking about solid state drives but I noticed that in July 2007 Gartner had electronic paper half way towards the trough of disillusionment. I don't have the background references but I would assume they're referring to electronic paper used for large signs and grocery store pricing. It got me thinking where the electronic readers are.
I think we're about a quarter of the way up the technology trigger slope but I'm curious what others think.
For people that aren't familiar with the hype cycle:
http://en.wikipedia.org/wiki/Hype_cycle
It's hard to read the photo but I believe that it shows electronic paper as 2 to 5 years from mainstream adoption in 2007.