HTC's short commercials promote Eye Experience feature for the HTC Desire EYE
There are other features that HTC has decided to promote through a series of short television ads for the HTC Desire EYE. The first fifteen second spot is for the Face Fusion feature. This feature allows you to take portraits and blend them together to form one face. A sliding scale allows you to control the blend. With Face Tracking, which is the focus of the second ad, you don't have to stand still to be tracked by the front-facing camera. It also allows the camera to individually track as many as four members of a group video chat.
If you own the HTC Desire EYE, the Eye Experience features come right out of the box. Most HTC One (M8) units have received the update (yes, even Verizon branded units). HTC will next update the HTC One (M7). Other models expected to receive the Eye Experience via an OTA update include the HTC One (E8), HTC One mini, HTC One mini 2, HTC One max, HTC Desire 816, HTC Desire 820 and the HTC Butterfly 2.
source: HTC (1), (2)