I would think on the grand scale it probably is inevitable that everything gets developed at some point. Look at Europe: there's probably not one square foot of

I would think on the grand scale it probably is inevitable that everything gets developed at some point. Look at Europe: there's probably not one square foot of flat land on that continent that didn't see some sort of human usage by now over history. Maybe the numbers don't pencil out today, but next week the world could change and now you are selling off parcels to people interested in improving the land.