I had recently been reading up on a device called SCIO, which is an enhanced version of EPFX/QXCI. It communicates with the subconscious and uses biofeedback. The scientist that created it realized that everything living is Quantic in nature, or based upon the laws of Quantum Physics. While it doesn't record dreams, it communicates with the mind/body in pretty amazing ways.

I was able to experience it yesterday, since I wanted to try it to help my breathing and see if anything was out of balance. It did accurately register that I was allergic to bananas, and it has helped in a few other areas as well. I had some NLP sessions that afterwards I was mentally exhausted because it gave quite the mental workout.

Something like this may one day lead to devices that can record dreams. If dreams are the process of ionic exchange, like other biological processes, then they would involve frequencies, volts, amps, resistance, and other potentially measurable phenomenon.