I think that people are after a combination of SHAPE (same size as a typical Corny keg), PORTABILITY (lightweight vs SS), OPACITY (being able to see the volume left over in the keg) and Low/No OXYGEN INGRESS.
I find it obvious why anyone would suggest that your product be trialled, as it's the closest available for all of those features. All other fermenters are the wrong shape to assimilate into existing kegerators. Maybe it's a compliment?
If you can design something that has the above, then I'll buy 5 today. Light exposure can be managed in my current setup, and would take translucent over opaque any day. The silver ones mentioned previously I would not buy, as I currently value reading volumes higher than the other desirable features - but that's just me.
Great work - and thanks for uploading pictures / designs. Plenty of us aren't on bookFace and appreciate the updates here.