FYI: Reconfigurable computing is like parallel computing, but instead of running all of the threads on commodity hardware, they are each dynamically implemented on a FPGA. This makes a super computer with thousands of simultaneous processes much cheaper, and take far less space, if you can program the system.
http://en.wikipedia.org/wiki/Reconfigurable_computing
Wikipedia says that reconfigurable computing systems commonly increase speed 4 orders of magnitude and decrease power consumption by one order of magnitude. (that's right, order of magnitude) However, this is in spite of the fact that FPGAs are behind commodity hardware by almost the same amount. If memristors make a decent dent in the hardware disparities, then reconfigurable computing could be huge.