Originally Posted by rkomar
Judging by how it works, I'm not sure if the pixel size can ever go below the thickness of the film (otherwise, I can't see the black/white gel being able to rotate over and back). So, finer pixels would mean a thinner layer of pigment, which would probably impact the contrast. I don't know how close the pixel size is to the film thickness, but I would suspect it's pretty close to it already.
I'm not sure about the film thickness but the individual pixel capsules are 0.04mm in diameter.
That works out to a maximum 625 dpi resolution if the pixels were defined as one capsule each. That is just beyond LCD bleeding-edge tech so that kind of backplane is still years away. SVGA 6in panels run 166 dpi or about 14 capsules per pixel, XGA panels 221dpi or about 8 capsules per pixel. Going much higher will probably degrade contrast long before thickness becomes an issue.