According to Imagineer, “Mocha is not trying to replace the big 3D camera trackers out there.” But you’re right the full Mocha has some light camera tracking capabilities, though not implemented in SliceX or Track X. And not all scenes lend themselves to planar tracking. I just wonder how they would implement that in a simplified interface. It certainly would be useful, if not applicable in all applications.
On the example you showed, moving around a 3D title needs 3D camera data. So you either need a 3D camera tracker (like what’s in AE and not in Motion) or you do “fake” 3D camera tracking, which is picking a point in the scene, tracking it, and moving your 3D title in reference to that point with a stationary camera, guessing the focal length of the lens. That works in some instances, but for more complicated motions it doesn’t work. You’ll notice all the examples have a single motion to them without panning, and there isn’t any orbiting. I often track handheld shots. This method usually fails with that situation.