I can see where he's coming from but consider it a very strong indicator of stupidity to make predictions that far into the future. 
Doesn't that depend on the nature of the prediction?
Obviously, to an extent. But only to an extent. You can't extrapolate any trends that long into the future, you
know the calculations will be thrown completely out of whack by an unforeseeable event at least once during that timespan. Unless you're talking something really basic like the half-life of a radioactive isotope.
