I have skipped through the article. I was looking for a list of vertical color filter sensor makers. In the past I've found one Russian firm, Canon, and Siemens might have had a Foveon technology licensed mobile sensor. If anybody knows of a list, please let me know.
Now, there has been some issues with the Foveon. Apart from the reds getting noisey and dim, as the light passes through the layers, some of ths color meant for deeper layers gets lost, resulting in that noise and unbalance. They compensate for this. But the layers themselves are artifical cutoffs, not how the eyes overlapping layers work. These are potential routes for inaccuracies. You really need at least 5 layers to get it more accurate. Now, the cutoff is likely soft enough to give you some overlap. But two issues, accurately shaping each response layers to human vision is good but even more accurately recording values across the color ranges is better for software to get a hold of things more accurately.
Now, Foveon also has gone to a combined pixel in one color layer, something I don't want. The 4:2:0 of layering. I don't see how it could be as accurate.
I have waited decades for video performance from these chips, a number have. But it didn't come through and the market turned down. Good video performance was going to be a seller of cameras. It was just it was so poor back then, but even more reason to buy an X3 with good video performance back then.
There actually was a Foveon chip years ago that seemed to have aspect to pull 720p24 off sensor, which people could have jumped at.
But the issue with Foveon is that Sony got and bought vastly superior sensor technology outside of X3 itself (and are supposed to be developing X3 like technology). Canon also has technology. Their best bet is to partner with a company like the one that bought Aptina, that has a lot of cross licensed Sony technology, or samsung or Red. Then they could do the sensors with updated X3/X5+ technology, with very good low light and HDR for Sigma cameras, high end security cameras, phones, and broadcast pro cameras, other video cameras and some pocket cameras.
Frankly I want a x7 (UV, 3 primary two complimentary, and IR). Very useful for a range of things. But for cinema x5-x7v to better match the human eye (x7v: blue, a spread accross the overlaps with green, and red). Even a fullhd version would be useful. But realistically 4k. The data stream would be mixed down to 4:4:4 to keep the data rate down, even 4:2:2 or 4:2:0 consumer. We can basically do away with the debayering and color grading steps in ENG and broadcast due to the increased accuracy over Bayer or film, with simple adjustments and auto color look settings. There was a recent article, maybe on not a film school, about robot colourists doing a good job. Outside of cinema, auto stuff to a desired look should be sufficient. The issue with Bayer, I see it produce some weird stuff in broadcast. This means an undesirable grading step, or some auto approximation. There was a time you would get shame for even mentioning using single chip in such environments (maybe due to complimentary single chip consumer cameras being so lousy). But Bayer is better. What is needed in broadcast, is no hassles accurate live results. That is worth money.