This is one of those things that seemed sorta cool (but not really) and probably the future will look more like it than what we have today. But then you start t

This is one of those things that seemed sorta cool (but not really) and probably the future will look more like it than what we have today. But then you start thinking about the cost to operate it and trying to get people to pay for very marginal value. And it's pretty easy to predict demise. I'm sure folks will say that's not always the case so please provide some examples.