Egami (Translation here) spotted a new Sony patent describing a curved sensor technology. Having a curved sensor allows an increase in the lens performance and reduces the size of the lens. Egami speculates that this may be ideal for the future Full Frame NEX-9 camera. But of course, if you bring a camera with a sensor like this current A or E mount lenses wouldn’t work. I highly doubt the NEX-9 will have a sensor like this.