Jenson's stuck desktop and Foster's recalibration of the futurism

I suspect many of you have seen by now Scott Jenson's presentation "Are we stuck with the same Desktop UX forever?" But, if you have not then it is worth your time. I went on to read the book he mentions Nick Foster's Could Should Might Don't: How We Think About the Future. Jenson's presentation suggests that Foster's book is a "how to", but it is more a useful survey of, and a call for the recalibration of, the futurism field.