"The Tentsile Stingray was conceived as a portable 3 person treehouse. It offers occupants a spacious triple hammock interior, accessed via a hatch through the floor or via a large front door. It can be suspended at any height and if dry, can also be pitched on the ground." - tentsile.com
There's very little that attracts me to the idea of camping - the bugs, the night bugs, no proper toilets, the shitty food, possible bear attacks, night noises, the wet morning air, the stinky people around you (not my own stink, I'm kind of into that stink), etc. - but if one of these floating tents were involved? I'd be all over it. And the thought of sleeping in mid air? Neat as hell. I don't really understand how you'd actually get into it, but since it costs about $1000, I'm sure there's some kind of invisible ladder or something.
(Also, the lumpiness of the ground is never a good bed, world. Stop sleeping outdoors if you have the choice. It's silly.)