And yet, we see (if rumors are correct) very different products in the same price range. If they were all targeting the same buyers, wouldn't we likely see a convergence in design and the competition be focused on MSRP?
Why does Sony not offer integrated vertical grip on its flagships, while Canon and Nikon do? Are they targeting the same buyer, or are they targeting buyers with different priorities?
Canon may have one ear on the competion in the top tier pro DSLR market but it will be a very quiet voice compared to their own internal build manual or the market research from their loyal professional goto's, who advise Canon on their gear directions.
So if the competition dives of the Pro 50+ mp cliff but Canon's pro advisors say...actually really really don't need that kind of resolution at the moment. I think 30mp is fine...then it's easy to see which direction Canon will go in. Canon know their market and they aslo know which pro's to go to to get well seasoned and trusted user case scenario advice from.
The high MP brigade is a niche market, the 5DIII was the clearest indicated of this. The 5DIII sold way more units than the 5Ds/r. If you need high MP, there's the R5 or R5ii (coming). I can't see any potential R1 users saying "It's an amazing camera but I really could do with more MP".
Personally, I have no need of a R3 or and R1. But then again, I don't shoot sports, news, war and I'm not a paparazi.
Wild life, birds, lanscapes, people, weddings and events. No sand, dust, tropical forrests, fighter planes, bomb shells, bullets, IED's or anything that requires a build level higher than an R5/R6/R7/R8. Your milage might vary.....