I'm right outside of NYC and, using an outdoor antenna pointed at the Empire State Building, I get about 35 digital stations, 7 of which are in glorious HD. All look great, even most of the SD stations. Some are duplicates and others are not of my interest, though.
But, my antenna faces E/NE and, depending on where your antenna is pointed, some of these stations may or may not materialize on your set. All these new sets have to use auto channel select up frontto find stations and I don't know how well that handles antenna redirection.
All the major networks (analog channels 2, 4, 5, 7, 9, 11, and 13) offer HD, although not all shows are IN high def. Some broadcast 720, others 1080.