True frame-by-frame Video Feedback: each copy shows the picture from a moment earlier, so movement leaves trails that swirl into the tunnel, like a camera pointed at its own screen.
Time Remap: keyframe which moment of a video clip plays at each point, so a clip can speed up, freeze and play backwards inside one layer, for reverse edits. Requested by users.
During 5.1 and after, there won't be many major patches or features; most updates will focus on stability for the PC versions.