Oil prices are essentially capped at $60/barrel for the foreseeable future due to unconventional extraction techniques -> was not long ago oil production was thought to have peaked. Solar power can be economical without subsidy. Robotic and minimally invasive surgery. Battery cost becoming viable for mass-market cars. Gene sequencing. Sensors for pennies. New materials (cheaper carbon fibre, metal alloys, semiconductors, graphine/carbon nanotubes). Most of the things mentioned as 'first half of 20th century' coming to the next 5 billion people.

For aerospace, how about affordability of a ticket over time (Ryanair vs Concorde)? Space travel: number of journeys per vehicle or time astronauts are able to spend in space (was minutes in early space flight, unlimited now). Transportation speed is a straw-man, the industry optimises for cost not speed.