Interesting article.
I note however a conspicuous absence of any reference to transmission technologies, and how these might be impacted by changing fuel economy rules. In an age of 7 or 8 speed software controlled auto transmissions, what does this say about the future of 5 or 6 speed manual vehicles ? Will 'World Cars' that are promoted in NA, continue to have significant engine and transmission variations in places like Latin America, Africa, Asia, Europe etc ?