According to Miller, both rhetoric and technology have this pushmi-pullyu affect, basically based on supply and demand. With technology, we are pushed by the supply of discoveries, etc, and pull along by external forces or demand. I can understand this and see where it occurs all the time. The iPad, for instance, seems to me like it is a push kind of technology. There was really no demand for such technology, but the technology existed to create or supply the artifact, and thus, we have the iPad.
Until I begin actually reading this book, which won't be for a while yet as I have the other book to finish first, I want to leave it with this quote from Miller, which I believe might sum this whole idea up in the proverbial nutshell. Miller states that "If rhetoric is the art that adjusts ideas to people and people to ideas, we might characterize technology as the art that accommodates the material world to people and people to the material world" (x). Food for thought.