The core of Human-Computer Interaction (HCI) is to analyze and understand the user’s intension, which can be mostly manifested from the facial movement and expression of the user. Hence, the stage facial detection and tracking is extremely important in an user-friendly interface between human and computer. In ULSee, we developed an ultrafast markerless facial tracking system which is robust to variation in environmental lighting, pose and occlusion. It can be run at a speed of 10 ms/frame on an iPhone 6S system. With such accuracy and speed, it can be used to support many intelligent HCI applications. In this work, we envision an intelligent lifestyle in the future that can be built upon the basis of the ULSee’s ultrafast markerless facial tracker, ranging from virtual reality, augmented reality, real-time facial recognition and driver drowsiness detection. We believe, that through the joint force between ULSee’s world-class tracker and our clients, more user-awareness HCI application will be invented and a new lifestyle will arise.