I stopped in to W-S to check out something else - this unit was on display - it is an inverted whirly grinder - looking up through the mesh you see a blade similar to my old Braun. It looks like you dump beans in the top around a cylinder type motor (reminded me of a BUNN commercial coffee grinder). the smaller grounds (and all the fines) would make it into the "ground recepticle" with the larger chunks remaining on the other side of the mesh in the line of fire.
They also proudly displayed the new Breville grinder - the one that is replacing the Virtuoso. The Burrs look identical to the Cuisinart conical burr grinder sitting next to it. The outer burr removes with a metal handle - they might even interchange. I remarked to the clerk that they looked similar - she responded that they both were made in China so they probably came from the same factory.