I just can't see this thing being $6700 when the A7RIV is $3500.
I have the A7RIV and 5D IV - with the specs we know so far i can see the R5 to be priced SIGNIFICANTLY higher than the A7RIV.
Given the specs we know so far, the R5 will be MUCH more powerful than the A7RIV (which is a capable camera, but certainly has its shortcomings).
The resolution of the A7 is a bit higher (though in real life this isnt as important as people think. Its very difficult to actual get images that are THAT sharp, to actualy take advantage of the 60mpixel. You need an incredible sharp lense and ideal conditions to get an actualy tack sharp image with so many pixels). But besides that, the R5 appears to be MUCH more advanced. The Video features are without doubt 2 generations ahead (even if we only consider the allready officialy noted features) and the 20fps with 45mpixel are also realy impressive on the photo-side and much better than the A7 with 10fps. And that leaves "meta" features aside, like a bad menu system, mediocre battery life, smaller lense selection, noteable worse skin colors, faster and wider service, a slow and unsharp viewfinder and display, bad ergonomics, dust collecting sensor and a smaller 3rd party accessoires selection. Dont get me wrong, the A7R IV is quite some amazing camera with a realy impressive AF system and Sensor - but its not as incredible and versatile as youtuber keeps telling us ;-)
I think the R5 may have the chance to replace a lot of photocameras in all kinds of works AND a lot of videocameras. It has the potential to be next allround-camera that the 5D II was once. In this position it can be worth quite a LOT of money.
6700$ is certainly to high, but I think a higher pricing than the A7RIV is certainly justified. Given that its very likely to be a way more capable photocamera and MUCH more powerful videocamera as well.