Smooth WiFi touch-screen focus pulls!
From your phone, connected by WiFi to the Z, you can pre-select and store two focus points (A and B), then go between the points with no focusing delay or glitches. The stored points are focus pre-sets, not where you are asking the camera to try to focus. The focusing occurs at a chosen point first (by touching the phone screen), then the point is stored. So, you get smooth transitions, touching A then B and back and so on, as seen in this test video.
This uses the Lumix 25mm F1.7 lens.