At the beginning of this year we heard Sony's plans regarding new camera sensors which, opposed to the standard RGB (red, green, blue) contained an additional W standing for white pixels. This way the sensors, as we've been told, offer “higher sensitivity, enabling high-quality shooting with low noise even in dark indoor or night settings”.
Sony has now changed the specifications to revert from RGBW to RGB, "as it was found not to meet certain conditions of Sony's image quality standards." These sensors should be at the core of the 2013 Xperia line-up's imaging features and the changes apply to both the 13- and the eight-megapixel variants. On one hand it is a pity after all the tech talk and advantages we've been told but on the other hand we're glad to see that Sony is taking imaging seriously and had high image quality standards (even if it means removing a W from a sensor to follow them).