EXPONENTIAL SPEED. “When he started five years ago…the technique was so slow it would have taken several centuries to generate images for a cubic millimeter of brain—about one thousandth the size of a mouse brain and a millionth the size of a human one. Now Lichtman can do a cubic millimeter every couple of years. This summer, a new microscope will reduce the timeline to a couple of weeks. An army of such machines, he says, could put an entire human brain within reach.”
http://www.popsci.com/article/science/neuroscientist-who-wants-upload-humanity-computer