alt Hacker NewsMakes perfect sense, in nature you have a lot of both practical and odd functionality out of filling "bags" with air or liquid.
This is a pretty cool approach. If they can improve the visual presentation it can also look pretty awesome. Gives me some inspiration for drawing scifi designs too.
Liquid seems like a better approach from an engineering standpoint because it is non compressible. But then I imagine dealing with liquid is more of a pain than air.