I saw a mention in a recent thread that there are still DC power systems in some of the old Chicago skyscrapers. I also saw a mention quite a few years ago that the NYC theater district still has (had?) DC power, as a holdover from the days of Edison himself. And I believe I saw a recent reference here to DC power in Los Angles or San Diego.

Can anyone confirm that such systems are still in operation? What in the world are they doing with them?--you pretty much can't buy anything for a DC system, and haven't been able to for years. (OK, a regular incandescent light bulb will still work, but you're not going to find a TV or a computer or a stereo that's designed to run on a DC system.)