Thanks for the responses... DAO makes sense for the reasons a few of you have described. I choose revolvers for their simplicity and relative safety. DAO seems to take that one step further.
My 10 year old son is learning to shoot with my double-action 22 and he shoots it single action. Even though I have him totally safety trained, and I keep my guns locked up most of the time anyway, I could imagine him finding one out and thinking "I could just cock the hammer" before he would think "I could just pull the trigger". Again, I've trained him thoroughly, but he's fallible like the rest of us. DAO would eliminate that level of risk for a home gun.
But I gotta admit, I think a hammer looks a little bit sharper on a GP than no hammer at all... If I can get past that aesthetic I might buy this thing.