Have they taken the next step and made the library door theft detectors* "smart" and able to read the RFID codes and tell whether a book is checked out or not?

Have they taken the next step and made the library door theft detectors* "smart" and able to read the RFID codes and tell whether a book is checked out or not? That would make so much of a difference for Circulation/Stacks grunts at a library who spend much of their time sensitizing and desensitizing books (most of the rest of the time is spent re-shelving). * Of course those detectors are just intended to be deterrents, but few actually stop people from walking out of a library with a non-checked book (that's what security [sometimes "information"] is for) ... and that's why we need to keep Reserve Book Rooms.