One point I'd like to make on this: There's the obvious question, why bring up the subject now when they don't even have the technology ready? The answer is ea

One point I'd like to make on this: There's the obvious question, why bring up the subject now when they don't even have the technology ready? The answer is easily revealed by the response: to get over the giggle factor as early as possible. Right now much of the commentary is about how ridiculous or silly this is, but that will fade with exposure and with publicity of successes in testing. There are lots of things that have the same problem. Legalized marijuana, space tourism, reusable launch vehicles, manned mars missions, 3D printed organs, etc. Often times it's as important to get over the giggle factor as it is to build something that works. Personal computers and tablet computers ran into the same problem, but once people stopped thinking of them as toys people got down to the business of making practical use of them.