10 years is too close -- 30 years out will generally lose the pernicious connection to the present and "how do we get there?". The idea is to "go out there and

10 years is too close -- 30 years out will generally lose the pernicious connection to the present and "how do we get there?". The idea is to "go out there and bring the ideas back" rather than try to go from the present to the future.