Many challenges ahead
There are many challenges facing the study, starting with a realistic accelerator design that will allow these promises to be fulfilled at all energies. The unprecedented precision in Z, W, Higgs and top measurements at the FCC-ee will aslo require significant theoretical effort in a new generation of theoretical calculations, perhaps beyond the current state of the art but within reach at the timescale required by the FCC-ee, in order to reap the full benefits from their interpretation. Finally, interesting developments will be needed for the detectors to match the physics program: large field magnets, MAPS for ultra-light trackers or granular calorimeters, wireless data acquisition, are among the many possibilities to be studied.
Many of the accelerator, theory, and experiment future developments are common with the FCC-hh. More details can be found in the following links.