It really depends on the TV. It's true more 16:9 displays are likely to be set for showing the entire frame instead of a TV cutoff but there's not going to be a consistency across all HDTVs in the world. I suggest watching the frames around all edges in your NLE just to make certain there are always= a. no titles going beyond the title safe area, and absolutely nothing you wouldn't want a person to see at the edges of the frame, even beyond action safe. That means boom poles, c-stands, etc. Action-safe is action-safe but on some HD displays it's going to be shown anyway so you might as well take it into account.