I watched this, truly wonderful. Although, when he explains the time in which human invention (information) doubles, how does one know in which a point should start/stop measuring. For example, yes you could start when the first invention was 'invented' but you can't just say, OK lets stop at this moment "blah".... and see how long it takes us to double the inventions (human information)... I'm not great at explaining things, but hopefully you understand. He says we will be doubling information every thousand of a second or whatever by 2015, does this hold true if the measure of information was for example from the first invention to now? then the unit of measurement would change and his statement would not hold true. The unit of measure can't be true as it would always change...
Maybe I missed the point... and someone can elaborate....