Ian Morris on "why the west rules", which seems to be a provocative title for an interesting book on historical geographical trends and their projection into the future: http://www.youtube.com/watch?v=tvkHiL-H2io. He starts talking about the future at minute 27 and basically concludes that a singularity scenario is one of two possibilities for the 21st century, the other being collapse. Nothing new, but encouraging to see this increasingly in the mainstream.
Interesting - you'd assign a significant plausibility to "business as usual" for the next 90 years?
Yes. Much less for 200 years, where I expect ems to speed up progress, if nothing else happens before.