I wonder if the microfluid part would give the same result as just stirring/pumping the fermenting wort around on a regular (non-micro) scale.
I was thinking this as well, but I'm also wondering what their pitching rate is as well. I'm thinking that the yeast must be in a stationary phase in the bioreactor and are just feeding on the wort at whatever rate it is being fed to them.
Extrapolating a bit, I wonder if you could replicate this by having some sort of setup where you have your yeast slurry in a small keg or water filter chamber and slowly circulate wort through it by jumping it from one keg to another.
Very cool tech from the sounds of it. I'd love to get into the nuts and bolts of it. I'm also wondering if it only works for certain gravity ranges, beer styles, etc., or if it is something that will work for any fermentation.