Why are you using so much brain power to put down those who dare to dream? Sure, the immediate applications of this technology may not be useful right away, but space exploration has resulted in many advances in technology that improve our every day lives.
People should be encouraged to imagine wild ideas that may or may not work and may or may result in immediate satisfaction. That is what makes the human race great: the potential we have to be creative and innovate.
We have many people working on many other more immediately threatening issues, but why shouldn't the author dream and explore new possibilities? Heck, who knows how this technology could be applied to advance gardening here on Earth?