P8 camera sensor is claimed "The world’s first four-color RGBW sensor enhances brightness by 32 percent in high contrast lighting situations, reduces it by 78 percent in low light environments. DSLR-level independent image processor enabling noise reduction when shooting and intelligent detection of a high-contrast lighting environment." It's not clear what exactly makes Huawei camera "world's first RGBW," as other smartphones on the market already use sensors with white pixels in the array.
The camera also features "Industry-leading Optical Image Stabilizer technology up to 1.2°, enabling high-quality photos and videos, and managing camera shake so images are consistently sharp." For a very good image stabilizer one needs to have about 2-2.5deg range, but 1.2deg is not bad too.
About a half of Huawei P8 presentation is devoted to the camera (Youtube presentation is here):
Thanks to TS for the pointer!