I flew domestically last week, NewarkNJ-Chicago-NewarkNJ. I was startled to find that there were no longer grey plastic bins at security, and that the 3-1-1 Quart bags were to be left inside my carry-on, as well as my tablet computer. My shoes, ski jacket and sport jackets had to be laid directly on the belt. I looped my belt through the handles of the carry-on. (This was a general admission line, with a magnetometer rather than a body-scanner. But I saw no grey bins anywhere else, either.)
Even the Business Travel column in the NY Times hasn't mentioned a general policy change. Have others found this elsewhere? The concourse I left from at EWR has many, many international flights, BTW.