I don't see anything particularly revolutionary in the Slash printer, which doesn't actually exist yet as a product. I doubt it would be much faster than current machines you can already buy when you use fine layers; the claimed speed improvements seem to be due to using super-thick layers, which defeats the whole purpose of SLA printing: the ability to get good detail compared to FDM. Most of the time that the process takes is from exposing individual layers and then peeling them off the build plate; I don't think that this machine gets away from that basic requirement. The SLA process, by the way, doesn't involve sintering; it works by solidifying a photo-sensitive resin.