Tony writes:
Rumors indicate that Canon and Nikon are planning full-frame mirrorless cameras to compete with the Sony a9, a7R III, and a7 III. If you want to go mirrorless, should you wait for those announcements (hopefully in 2018!) or sell your camera and switch now? We can’t perfectly predict the future, but we’ll do our best to give you some idea of what to expect in 2018.