His conclusion:

1. The Siemens star shows the differences most clearly. As the resolutions go up, the false color decreases, and the star is resolved nearer the center.
2. For the text, that is also true, but the resolution differences are much more subtle. Except for one paragraph with a lot of false color in the a7III shot, the false color is about the same as the a7RIV. So is sharpness. The a7S shows a lot of false color, and it is not limited to just one paragraph.
3. There are three checkerboard patterns of varying fineness to the right of the Macbeth color checker. There is negligible false color in those, even with the a7S. At this resolution, none of the cameras can resolve the checkerboard immediately adjacent to the Macbeth chart, which is the finest. All of the cameras resolve the checkerboard on the right of the set, which is the coarsest, and it looks about as sharp in all four images.
4. The focusing target between the checkerboards is slightly more poorly resolved with the a7S, but the other three cameras do about the same job with it.
5. The rest of the image look the same with all the cameras, except for color differences due to a combination of the camera’s CFA spectra and the Adobe Color profiles for each camera.

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Fujiablog (Google translation here) published  the first review of the new Voigtlander 50mm f/2.0 APO Lanthar lens. Specs might not impress but the performance surely does. Here is the google translated conclusion:

If you limit the performance of a lens to things such as resolution, sharpness, and good omission, it is a lens that has a monster-like performance. In this blog, various lenses have been tested, but Voigtlander APO-LANTHAR 50mm F2 Aspherical E-mount may be the best performing lens ever.

Chromatic aberration was also corrected well, and purple fringing was rare.

I think that the design is where the taste will be divided (I personally feel that …), but there may be a wolf-like goodness with a sheepskin (especially the hood is just a cylinder) I think it ’s not good).

Reasonable price for the performance is also a merit (50mm ultra high performance lens is often over 300,000 yen), and it is also recommended for users that that manufacturer and that manufacturer are too expensive to buy .

I looked through the viewfinder and focused on it. There is no lens suitable for this combination with SONY α7rIV! I felt that.

The lens is yet not available for preorder outside Japan…

Three videos long review of the  new A7rIV by Maarten Heilbron.

Sony A7rIV and new accessories:
Sony A7rIV in USA/CA at BHphoto, Adorama, FocusCamera, Amazon, BuyDig, Henrys.
Sony A7rIV in EU at Calumet DE, ParkUK, WexUK, Calumet NL.
Sony A7rIV in Asia at Sony Japan. Sony Australia.
Sony VG-C4EM grip in USA at BHphoto, Adorama, Amazon, FocusCamera, BuyDig, ParkUK, WexUK.
ECM-B1M Digital Audio Shotgun Microphone at BHphoto, Adorama, Amazon, FocusCamera, BuyDig, Park UK.
XLR-K3M Mic at BHphoto, Adorama, Amazon, FocusCamera, BuyDig, Park UK.

Fengniao shared those nice images of the HUGE  new Sigma 35mm f/1.2 FE lens.

New Sigma FE lenses:
Sigma 35mm f/1.2 FE at Adorama, BHphoto, Amazon, FocusCamera, Henrys. In EU at Calumet DE, ParkUK, WexUK.
Sigma 14-24mm f/2.8 FE at Adorama, BHphoto, Amazon, FocusCamera, Henrys. In EU at Calumet DE, ParkUK, WexUK.
Sigma 45mm f/2.8 FE at Adorama, BHphoto, Amazon, FocusCamera, Henrys. In EU at Calumet DE, ParkUK, WexUK.

Voigtlander/Cosina published some image samples you can find here: cosina.co.jp/gallery/iida-50mmF2E/03.html

Sony A9II at BHphoto. Adorama. Amazon. FocusCamera. BuyDig. Calumet DE. WexUK. ParkCameras.

Sony Artisan Patrick Murphy-Racey is the only one actually intensively testing the new Sony a9II on the field. Here are his thoughts:

And here is a  new introduction video by Georges Cameras: