The above animation outlines my theory regarding a highly maneuverable lighter than air craft. The concept was inspired by fictional unidentified flying object encounters.
The original vacuum airship concept was first proposed by Francesco Lana De Terzi, the "father of aeronautics," in the year 1670 AD. The design proposed above is of the unmanned aerial vehicle variety, but the underlying technology, like that of a conventional airship, can come in a variety of shapes and sizes both manned and unmanned. The bulk of craft utilizing vacuum lift technology would be constructed of strong yet light materials such as carbon fiber or perhaps nano-tube materials at some point in the future. Heavier materials would likely be used sparingly in load bearing areas to distribute pressure away from lighter materials, similar to truss structures on the roofs of today's houses.
In the future I envision this technology opening up the Earth's skies not only for personal travel, but also for personal living space. Today we see building sized cruise ships traveling our oceans, vacuum lift technology can bring similarly sized craft to the skies. Vacuum lift technology is quite simple and also very safe. Once the craft is lifted into the sky it needs no energy in order to maintain it's altitude, should an engine fail the craft would not fall, but only float at its current altitude. Vacuum lift technology is not only simple and safe, but also efficient requiring energy only to move in three dimensions, but not to maintain altitude.