TheRiov wrote:
answering my own question and speculating WAY WAY outside any expertise I have:
Military:
with a power unit that small it may be possible to make high speed tanks mounting lasers or rail/coil guns as weaponry. Presumably naval vessels could travel farther faster. With power limitations removed, presumably large flights of aerial platform drones could be used semi-permanently for battlefield reconnaissance, C&C.
Given the size of reactor they're talking about, drones would most likely still use combustion, as would helicopters, fighter jets, and military land vehicles. I have no idea how small it could eventually be reduced so it's best to err on the side of caution and assume that these sorts of things would be limited to larger platforms like cargo planes, strategic bombers, and ships, at least within our lifetimes. Eventually, very small ones might appear, but unless they're a solid prediction by the experts I would not include them in any estimate.
With ships in particular, all ships could have nuclear power which would greatly reduce the need for oilers. This would greatly increase tactical and strategic flexibility - not only are the ships not tied to their fuel supplies, but be eliminating some of the supply ships you eliminate the maintenance and personnel costs of those ships, which means considerable savings in the long run. This is the sort of thing that allows lesser defense spending without the disproportionate cuts in military capacity that usually accompany it. Personnel costs in particular are important because those personnel can still cost long past their time in the military.
Quote:
Airplanes could travel farther faster for commercial flight, expanding the globalization. From an economics point of view, shipping would become far cheaper, making trade tariffs required for more protectionist states but eventually bringing the world closer to the 'one world economy'
While air travel might be cheaper, I predict the limits of human endurance on an airplane would remain its limiting factor. Supersonic flight might be easier since fuel consumption would be less of a factor, but the issues of making a supersonic airframe would remain, and aircraft cannot grow much larger without corresponding increases in runway length everywhere they need to go.