It depends what you are looking for really. Quiet operation, or your hard drive running at it's coolest? Personally, I just mount a 120mm above my HDD's to keep them very cool. If I was looking for peace and quiet, I will prefer the enclosure to be more of a heatsink than an enclosure with a fan.
"Will this be the new way for engineers to seek consumer input?"
Very cool idea... I hope to see more of it.