They said this morning it's one roll-aboard and a briefcase or computer bag. My bet is there will still be people with a roll aboard, a computer and a briefcase. It just doesn't seem possibleto eliminate it all together.
Personally, I'm thrilled that the idiot with the 2 suitcases, garment bag, briefcase and computer bag will not be delaying my flight any longer. They hit you in the face after you board early, and there always seems to be some correlation between the later some one boards a flight, the more carry on luggage they carried.
We took a convenience and turned it into a "right".
As to the "public safety" aspect, opening and inspecting every bag, regardless of where it goes on the plane is something they should have been doing for years.