Mr. Chairman, I ask unanimous consent to revise and extend my remarks….
I was starting to think that maybe access to this feature was limited to subscribers, as well, but I decided to toggle it off and back on and try it again.
So far I’ve set up only one of four Cam v4s I received yesterday, and it’s looking out a window into my backyard. The view captures part of a stairway coming down from a deck, and the stairway makes a 90° turn partway down. I watched the live view while I went down the steps and started across the yard, and I could see that the view was partially zoomed in on me as I was moving laterally with respect to the camera. Then I turned around, walked back across the camera’s view and began up the steps, all while still watching the live view. At this point when Smart Focus kicked in, it looked almost like it was following me up the steps and past the turn, and I had this mental moment where I thought: “Okay, but wait…this is a static camera.” In that instant, it almost seemed like I was watching myself with a Cam Pan v3 with Track Motion enabled.
That is some freaky cool 
!
I realize that the Smart Focus control—even in the production app—has a “BETA” label on it, so I wonder if it’s just a little glitchy and required the off/on toggle to reset something.
Anyway, I don’t know how useful that’s going to be to me, but still an unexpectedly cool feature. Now I’ll have to amend my previous post.
Thanks for the prompt to play with this some more, @Antonius!