While many of us are excited by the prospects of the Canon EOS R3, a development announcement, as usual, left us with many questions. What I know is on the R3 page.
Much is known about the new RF macro lens, and the Canon RF 100mm F2.8 L Macro IS USM Lens page is filled with those details along with expectations.
Nearly everything is know about the new Canon RF 400mm F2.8 L IS USM Lens and Canon RF 600mm F4 L IS USM Lens. I'll call these completed reviews pending image quality testing, including with RF extenders.