Realistically a global government is not feasible within the next two decades. Nationalism is a prevalent topic in every culture; in proportional parliamentary systems nationalists form a considerable minority bloc and would only gather more sympathizers. In China and the United States, uber-nationalists are even more prevalent. What is more certain is the end of nation-state building in Africa and the Middle East. I also foresee international organizations pretty much unifying economic imports/exports and internet regulations.
None of the quoted information is surprising. Obviously we can't predict the future with certainty, but I think we'll see positive, drastic developments in medicine and energy 10 years from now.