Author here. Thanks for commenting, interesting point!

However, as you can see in the section "1960s", many similar comments were predicted 50 years ago. The point I address in this paper is that optimism is easy when things are going well.

This is a great example. Lots of people are saying today that we will have X in 10 years. But in 2006, no one was saying we will have X in 20 years.

I'm not saying you're wrong, but I'm saying it's worth questing why you are so optimistic, and whether it's because we aren't looking at the big picture.