There are quite a number of new technologies being researched, developed and tested at various leading-edge defense contractor facilities, for example, at Groom Lake/AREA 51's highly compartmentalized, multi-faceted conglomerate complexes.
Besides a new generation of VTOL-based UAVs (Unmanned Aerial Vehicles - remotely-controlled surveillance platforms, some of which may be disk-shaped), there are ongoing development and testing of electrochromatic panels as part of innovations relevant to "daytime-stealth" capabilities.
The electrochromatic panels are comprised of thousands of tiny sensors that function as video-cameras that take images of background scenaries, transferring them to the other panels on the other side of the aircraft. This gives the illusion that the aircraft is almost transparent. What the ground observer sees is whatever background images behind (or above) the body of the aircraft that are transposed to the "observer's" side of the body of the aircraft.
For example, in a recent artist's rendition of a proposed "Stealth Blimp" , one can see the stars from above (and behind) the blimp, giving it an illusion of being transparent, and making detection somewhat difficult.
That an ongoing research, development and testing of such electrochromatic panels at locations such as at Groom Lake/AREA 51 may be taking place was first suggested in an article written by aviation writer, Bill Sweetman .
Coincidentally, after that article (suggesting that Groom Lake/AREA 51 was still abuzz with various projects) appeared on POPULAR SCIENCE of May, 1997, the June, 1997 issue of POPULAR MECHANICS, in turn, strangely came out with an article by Jim Wilson suggesting that Groom Lake/AREA 51's operations were transferred to Green River missile launch complex in Utah. This was the beginning of the false rumor that AREA 51 had moved to a new location in Utah.
The Green River missile launch complex right now still appears to be an old, abandoned site, with nothing visible of any significance. (As far as Utah is concerned, attention should rather be focused on DUGWAY PROVING GROUNDS, where lots of innovative programs are ongoing, for example, leading-edge research on biological-chemical warfare programs).
In the meantime, Groom Lake/AREA 51's conglomerate complex is abuzz with new programs.
It is estimated that there are still anywhere from 1800 to 2300 defense-contractor employees constantly at work in highly compartmentalized projects.