Already, tests carried out with a prototype at the PalomarObservatory in California have achieved astrometric resolutions of 100 millionths of an arcsecond, and the improved atmospheric conditions in Hawaii will increase this by a factor of three.
It's taken more than six years of development, but a new imaging system for the Palomar Observatory's 200-inch Hale Telescope finally started capturing images last month, and promises to aid significantly in the search for planets outside our solar system (otherwise known as exoplanets).