It also wouldn't work not due to space constraints but due to the fact Americans are much more conservative and the moment someone get out of the capsule to go to the bathroom naked someone will be offended and privacy isn't a given. Most likely if Universal went that route it would most likely be young people on a budget. They aren't bad. They are no different than staying at a hostel just instead of sharing a room with strangers, you have a small area just to yourself.
Its the same reason European and Asian style spa resorts won't come to the US despite them being a great fun experience.
Its the same reason European and Asian style spa resorts won't come to the US despite them being a great fun experience.