I am guessing that Canon will not abandon that audience but rather try to develop features that continues to give wedding and event photographers using canon a competitive advantage. It seems to me the biggest problem these photographers have today is that brides want pictures up on Facebook immediately (as in before the ceremony ends) and their friends can do it with their cellphones more quickly than the person they are paying to shoot the wedding can do it. The first manufacturer who can help pro photographers get images posted to social media as quickly and seamlessly as the wedding guest using an iPhone will have a winner in the marketplace. That's the sort of thing that will sell cameras, not megapixels, dynamic range, etc.
At first glance, I was onboard with that idea, but after thinking about it I have completely changed my mind. Everyone knows camera phone pictures are quickly digested. They are visual fast food. I wouldn't want to associate my photography with that, nevermind the fact that directly uploaded images won't be properly edited. I think it's good
that couples are waiting to see their professional pictures
. It's an implicit demonstration that a lot of work goes into creating them. Additionally, I rarely see a bride on her phone during her wedding, so at best her friends will see it. And anyone who still has a Facebook page for their business knows what a profit hungry platform it is now, forcing you to "boost" page posts to get them seem. So, even if you do get them uploaded quickly it'll only be to a limited audience. Long story short, pro photogs shouldn't be worried about competing with camera phones. If a bride really wants to see her pictures right away, she can pay extra for a reception slideshow.
All that being said, the 5D IV sure as heck better have wifi/NFC built in. They can do some good ol' fashioned engineering and move around the supposed obstacles.