They listed it at the very end of the Release Notes but its a killer feature - I have been struggling with the random packing of components onto the PCB when the first export to PCB is done. It almost made me delete most of the schematic and then incrementally add to schematic and then make it add to PCB but its such a pain.

This new Pack and Move feature seems like a life-saver, since we can use it anytime to add components to a selection with Shift-select and then that will pull it into the other desired grouping area on the PCB.