to clarify this argument I guess I would have to see some definition on what exactly this means:
You could achieve some scary computing densities
Lots of hash in a small box.
Exactly. From the looks of things you could put 2 BFL Single sandwiches in a normal BFL chassis. So, 3328 MH/s, 320w all running at 40-50 Celsius in a compact package. I'd pay a price premium for such a "mini mini rig".