I didn't know that druids still exist, but they do. Some, such as the New Order of Druids even have web sites (warning: druid music.) And not only that, but they have some pretty strong opinions on what sustainable technology is. The picture at right pretty much sums it up (har, har, har.)
Obviously they have a much different version of the future than, say, the Matrioshka Brain enthusiasts.
There are some interesting points and quotes in this article, including one from Arthur Clarke - "“Every sufficiently advanced technology is indistinguishable from magic.”" It reminds of the movie Waterworld or Beyond Thunderdome that are loaded with gadgetry people are struggling to use. Is this the answer to our woes? Who is ready for the rule to rule?