Usually we think of technology expanding exponentially, and of timelines being linear. These two concepts don’t seem to go together well, but Envisioning Technology manages to merge both into the same graphic. Time progresses as the radius of the background rings increase, but since these are circular, the available space for each technology branch grows quadratically. The future certainly holds a gloriously diverse set of technology, and this visualization does a good job of showing the predicted arrival times of some of them.
See this info-graphics. Click on the image to enlarge the info-graphics.