Once ray guns come on board around 2025, I think aircraft/missiles will begin to become obsolete. Miniature nderwater autonomous robots will be able to sniff out locations of submarines. So we need to go back to the battleship. We need something large enough, with nano armor that is 5x stronger than steel, to withstand real bullets. With missiles out of the equation, could we see a return of Yamoto sized battleships? But perhaps much, much larger, nuclear powered, with ray guns for AA defense. For artillery, I would like to see some 30 inch conventional guns (in case of power failure), along with a plethora of rail guns firing in the mach 10+ range. I am imagining something about 10x larger than the yamoto, perhaps a million ton displacement, that can be parked about 400km off a country, and wipe it out completely, with a combination of laser cannons, high powered railgun fire, and 30 inch or so conventional explosive filled shell artillery as backup and after rail guns defeat the countries limited raygun defenses. For armor, I would like to see something kevlar/nano/steel hybrid plating, perhaps 6 feet thick, that could defend against other rail gun fire. Anyhow, I think once you have the AA defense down, having a very large platform that can wipe out/bombard an entire country at low cost is the way to go, using conventional tungsten slugs (one slug per building). It would be a low cost way to destroy a country and would not leave radiation behind as in the case of nukes. The current model of bringing aircraft carriers, with 350 million dollar planes, into an area to do sorties will not work against laser defenses. The return of the capitol battleship is inevitable, but on a much larger scale. Thoughts/comments?