I, too, think this is an interesting product. I don't think the need for a 3-point suspension is a huge problem. You could achieve "shoulder width" with a collapsed trekking pole (or two, in tendem) as a spreader, but I bet it gets very tippy if you have to hang from just two trees. I'm intrigued by the suspension of the foot end.
It seems to me that this competes well with the Exped Ergo + Down Air Mattress. (Note - I haven't seen or used either setup. so that's a guess.)