If it's user controllable, I'd call that wireless, not auto focus. And it still needs a focus puller.
As Geoff Boyle presented in cinematography.net, it looks to be a "user controllable" autofocus system, not a wireless (ref is the C300Mk2- same system I believe). A wireless system as we know it requires the user to chose the actual focus point- with Canon's system looks like you can touch the focus point on a tablet running the app, and the camera focuses for you. I would hope you can choose the rate and rolloff, or cushion of the focus pull- but I don't know haven't used it.
With episodic TV and lower budget features we have to move at a fast clip, always shooting the rehearsal. The focus puller needs to nail the focus without marks, without rehearsal. Not everyone can do it. If an autofocus system actually works, and you can control the timing and points of focus on a rack, I think that's great- it'll up the shot count/ page count on the day.
Pulling focus is not a mundane technical task in my opinion. There is an art to it- when to pull, where to pull, especially on these fast moving shoots. Artistic input is a true asset, whether you are pulling via an Arri FF4, WCU, Preston, whatever. AND if you are pulling focus via a tablet. Plus we know these systems won't work a fair percentage of the time, and your focus puller has to jump in for a manual pull immediately. So yes, always need a talented focus puller. The tools are varied, but the job is the same.
On marketing and corp shoots I often don't get a 1st AC of choice, sometimes none at all, so an autofocus system that works is an asset to me. A walk and talk with a wide open 300mm lens? Yes I do it if I have to but would much rather have a great 1st or a great auto focus system. The latter was simply not an option before.
The question still remains- how well does the system work?