Horace takes another look at the aviation industry and asks whatever happened to air taxis. Then we go back to the manufacturing miracle of WWII in order to ask what might be the limits to growth. That helps us describe the “top down” opportunity for iOS and mobile computing in general looking at the overall mobile phone market. Finally Dan asks what are the qualifications needed for an analyst to perform wide-ranging reviews of industries.
See also: Headroom (tweet).