Earnestly, what are we talking about here? About Canons new sensor? About general physical limitations of 50 MP FF sensors? About Canon strategies? About the credibility of websites devoted to photography? About the appropriateness of 36+ MP cameras for street photography? About continuous shooting speed? About shot discipline? ;-)
@ Marc:
You're right, quite recently Canon doesn't have the edge over its competitors when it comes to sensors. That's one of the reasons why I never gave their cameras a serious consideration. Sony seems to have the lead here, as the A7 shows. (And Nikon uses their sensors, too.) If I had complete confidence in Sonys strategy, I would already have bought one... But why being upset? No one forces you to get a Canon. Enjoy your Sony camera and let those 'dumb' people buy old wine in new sleeves. ;-)
Moreover the Canon 5DS (R) is a niche product for studio and landscape photographers, it's not a general-purpose camera. That is what the 5D IV will be designed for.
You raised the general disadvantages of a 50 MP sensor. Won't they apply to a new Sony 50 MP FF sensor, too?
As for DPReview, I appreciate the extensive technical background information they provide. But I nevertheless treat it with caution, knowing they were acquired by Amazon several years ago. BTW, DPR gave the A7R the same overall score as the 5D MkIII. And the A7 a lower score than the 6D... ;-)
And here's what DPR writes about the 5DS (R): "As far as dynamic range is concerned, WE'RE TOLD THAT the new 5DS and 5DS R should give the same performance as the current EOS 5D Mark III." That's my point: Pure speculation.
@ Robert:
There are photographers who use the D810 for street to great success. Ming Thein comes to my mind...
The D750 can't be the D610 with a bigger sensor, actually they share the same sensor. (https://photographylife.com/nikon-d750-vs-d610)
And in some cases even a toy camera can tick all boxes, in other words I'm quite happy with my D610. ;-)
Cheers,
Johannes