Like any of these turkeys know what the world will be like in 2040. I would like to see what they were predicting in 1970 for 2005. Until I see a reliable five-day weather forecast, I'm not going to put much stock in predictions for 35 years out.
I sure wish I'd bought stock in Intel 30 or 31 years ago (right after the collapse of the "Nifty Fifty"); but by the same token I'm glad I DIDN'T buy stock in Polaroid. :-)