Small, even tiny, homes are not a new thing. The house I grew up in was not much larger than the Futuro. A local museum has the house of a local artist inside, and it is about the size of a tiny home. Of course, you also have people living in mobile homes and trailers. I doubt that building codes have much to say on small homes, though zoning would.

That said, the design and materials would have an impact for more innovative designs.