HTC has been experimenting with different camera gimmicks lately. First there was the Ultrapixel camera in the M7, then the M8 added a second camera for simulated depth of field (that's the Duo Camera, of course). Now rumors are pointing to a new HTC device that ditches the Ultrapixel camera altogether. The M8_EYE will reportedly have a 13MP Duo Camera when it is announced next month.
M8_EYE is M8 with 13MP Duo camera.It's coming next month with Android 4.4.4 and Sense 6.0 on board. Die ultrapixels, die :) LOL
— LlabTooFeR (@LlabTooFeR) September 26, 2014
The M8's Duo Camera setup is using the same 4MP image sensor HTC used in the M7. It has larger pixels than many cameras to take in more light, but the resolution is lacking. Opinions on the camera were mixed, but that could change with an upgrade to 13MP. HTC has already taken to using higher resolutions sensors on devices like the E8 and Butterfly 2, which has a 13MP Duo Camera like the rumored EYE.
M8 + 13MP Duo Camera = M8_EYE :)
— @upleaks (@upleaks) September 13, 2014
Source : http://www.androidpolice.com/2014/09/26/multiple-sources-claim-htcs-m8_eye-is-the-m8-with-a-13mp-duo-camera-coming-next-month/