I've always kind of wondered if there could be a kind of murphy bed that, instead of folding into a cabinet, rose up to the ceiling and was held there by a counter weight? hmm... something like this, but my idea was infinitely more janky, with pullies and that yellow nylon rope that seems to be available at every hardware store.
You can suspend beds from the ceiling, for sure, but you have to build the ceiling for it. Most ceiling joists aren't particularly load-bearing. That's actually a lot less janky than what you linked - the part they don't show you on the wall? Yeah, that's basically a forklift built into your house. All you're seeing is the tines. Everything else is hidden in the wall somewhere - that's the kind of structure this neat little trick uses. Kill-you-dead level structure. It's like this thing. note the amount of effort he goes through to document what a bitch it is to get those magnets apart. Now ask yourself if you want to sleep on top of eight of those and just how hairy it's gonna get when the guy wires go.