I set up a few sets in the house, and we watched the very end. I set up my '52 Kaye-Halbert, and several collectible Sony sets on NTSC rabbit years, and my '66 Zenith was set up on a converter box (also rabbit ears). I noticed a significant delay between the NTSC signal, and ATSC. The ATSC came about 5 seconds later.
It felt really touching when Stan Chambers (started his job there in '47 when KTLA went on the air, and still works there today!!!!), and his grandson Jamie, were together live up at the transmitting tower house on Mt. Wilson to "throw the switch". When KTLA launched it's digital signal about 10 years ago, Bob Hope threw the switch. There was talk of his widow showing up for this event, but I guess it wasn't feasible.
It was really incredible to watch how all of the other sets died, and the Zenith kept right on as if nothing happened. Here are a few pictures, and I'll upload a video and link it once I get a chance to edit.
Stan Chambers and his grandson Jamie (viewed through digital box on rabbit ears)
Stan Chambers c. 1965 on Kaye-Halbert TV
Stan Chambers live, 6-12-09 on Kaye-Halbert TV