The efficiency of this machine is make-or-break; if it becomes feasable to use in an arid environment, and it's also cheap to produce, this could be world-changing. My intuition, on the other hand, tells me that this is a long time away from becoming ubiquitous, if it ever does. For one, it uses electricity, and environments which are able to support an electrical system usually can also support plumbing. Though it could make for an interesting addition to an environmentally-friendly home.