The way I think of it, technology travels curves. You can think of the steep part of the curve as the technology push stage, when new technology is changing very fast. And what accelerates that curve are issues of usability and accessibility?that is, having to get people to understand what the technology can do and figure out a way to fit it into their lives. Later on, as the technology change curve starts to flatten out, then users need a different way of differentiating the technologies. A good example is the personal computer: technology does not differentiate PCs these days. The only place you get any differentiation is when somebody recognizes a new need that a PC can address. Thats the role of what we call human factors?the fit of technology to individuals and groups of people.
http://www.technologyreview.com/articles/wo_brown062503.asp?p=0
