The Foveon sensor is still in full-force development according to a recent interview with Sigma CEO Kazuto Yamaki and the company has no plans on giving up on that project:
"No fp-sized Foveon-powered camera: Yamaki-san also revealed that the Foveon sensor needs a very powerful processor, which also requires a lot of power. So in order to make this technology usable, SIGMA will need to couple this with a large and powerful battery, which in return will make the camera a lot larger than the current fp form factor. We can only remain optimistic and hope that this sensor will be incorporated into a camera sometime in the future! (source: Cined)
