This vid really helped understand what they're getting at.
But crucially, MM says, their work won't be stuck in their walled garden. Everything players make in Dreams can be exported -- to the game development platform Unity, for instance, or to 3D printers. If this works, Dreams (and the PS4) could instantly become one of the most creative tools in digital arts. If hints at other companion software, perhaps for Apple's iPad, are realised, Dreams might be much more than a video game. Full-length animated movies, for instance, could be created in Dreams -- and MM really hopes that artists will pick up that challenge.
Reading that Wired article I find myself thinking what have MM created here. It could be huge. The applications beyond a game with loads of user developed content a la LBP are amazing. It could quite literally become a game creation tool in its own right, like RPG maker or such like, but much cheaper. It could become a huge tool for all sorts of 3D modelling applications, the link to Unity, etc is potentially genius.Done a fair bit of industrial 3D printing over the years in my job, and pretty interested in seeing a PS4 program that would allow for creations like that above. Impressed.