When Canon asked itself whether the EOS R was an "evolution or a revolution," the answer was simply "yes." Although it was meant to be tongue-in-cheek, this inquiry and accompanying answer is one we kept coming back to during our hands-on time with the EOS R.
5DM IV sensor in a smaller body; Lots of customization; Solid lineup of lenses from the get-go; Three adapters; each with a specific purpose
No in-body image stabilization; Low frame rate in continuous mode