E Ink more or less has a lock on the e-reader market, as competitor after competitor sees delays or simply disappears altogether. Today we have an update from another would-be foe, and there's some real potential here. It's electrofluidic e-paper from Gamma Dynamics and the University of Cincinnati, which we first heard about last April. The tech is similar to that in E Ink but, instead of simple microcapsules having both black and white ink plus a clear oil, the Gamma Dynamics pixels have a colored fluid in a pixel that's split by a reflective sheet. Using voltage applied to these pixels the ink can be forced up above or pulled down below the reflective separator, forming an image in a video-capable 20ms and delivering a near paper-matching 70 percent reflectivity. There's a picture below showing how the tech works and, thanks to confirmation that it can be produced in an LCD manufacturing facility, it's looking closer to production than ever. How close is that? Oh, about three years, meaning E Ink still has that market cornered -- for now.