Forget the flashy blasters and lightsabers from the Star Wars movie franchise, the technology I want to see developed and adopted is the humble moisture vaporator, which should really be called a condenser. Via Jim at Wisdom of the West, we have a portable condenser-cum-water bottle (note to pervs, the cum does not refer to Pastor Manning's favorite flavor-upper).
With drought being endemic to large swaths of the U.S., and lack of access to potable water in much of the developing world, the prospect of removing water vapor, which can play a role in exacerbating global warming, from the atmosphere could be a promising tactic in combating two problems. As far as water vapor in the upper troposphere goes, it could be possible (though not easy) to use high-altitude balloon-supported condensers to bring atmospheric water to the surface.
At any rate, Jim puts up a This Week in Water post periodically, much like Vixen Strangely posts a regular climate round-up. These posts are always a good read.
Just think what a $158 billion "Star Wars" program could accomplish if it were aimed at increasing access to clean, potable water for all of the world's residents.