The technology has been out there forever. The difference is that a lot of people seem to be interested in it now, and ideas are everywhere (from building the tools required on the ISS as opposed to launching them, to 'printing' the building blocks for a moon base).

It is possible that some of the more robust/larger ones would take off. I really don't see something like the Cube becoming popular (5.5" x 5.5" x 5.5", or double that) seems too small to be really useful, even though the price isn't bad.

It couldn't hurt, after all it is only money