At this point there is still a strip of adhesive along the bottom of the display that will hold the display to the frame like a hinge. You can loosen this adhesive by working the display up and down a few times.
Lift the display up from the frame and remove it from the iMac.
It may be necessary to slowly lift from one side to peel against the remaining adhesive.
Be very careful handling the display—it's big, heavy, and made of glass.
After the adhesive is cut, it cannot be used to re-seal the display in place. Follow this guide to replace the adhesive strips that secure the display to the rear enclosure.
Remove the two 4.3 mm T5 Torx screws securing the camera board to the top of the rear enclosure.
During reassembly, be careful not to over-tighten these screws. They have large shoulders and will not hold the camera board tightly against the rear enclosure.