not an expert in optics, but I thought the limitation of curved sensors in achieving the hypothetical reduction in lens complexity is every focal length would require a different curve radius? So you'd have one focal length that would be significantly simplified because the curve of the sensor would match the curve of the focal "plane" and any other lens you attach would have to become equally or more complex to match its curve to the curve of the sensor? I know for cell phones this wouldn't be an issue, because they have a single fixed lens, but for all the cameras with interchangeable optics, does flat makes more sense?

EDIT: after a bit of thought, if I'm correct above this would also benefit optics in many industrial applications. My brain is usually rooted in cameras people take pictures with, but there are optics and sensors in a lot of other applications. And of course saying "just cell phone cameras" is funny because they are by far the most popular cameras in the world, just that I never use them so they are a bit of blind spot for me.