There's a lot of Expectation wrapped around "Mobile App" depending on where you've used one before, it seems to me.
SmartThings mixed using with admin, in my opinion. There's only one user of the SmartThings Mobile App that should be adding deleting things.. that's me. Why did I have to give that capability to my wife?? She will not only never use it, will get angry about it being in the way.. if only for fear of clicking the wrong something. My kids would be worse.. no fear of clicking the wrong thing, in fact, there's where all the fun is. 
Hubitat is doing it right, in my opinion. Using the system needs to be available for everyone in the house. Admin should be limited to ME. (Although I'd be happy to outsource admin to my wife if only....)
The mobile app that Hubitat has been talking about will have three functions.. all for using the system. Nothing in the App is targeting admin.
- The mobile app will have a dashboard, probably in line with the v2 Dashboard Patrick has hinted at. So if you deploy Dashboard v1 today, you're getting a preview of the Mobile app.
- The mobile app will have notifications. So if you deploy Pushover today, you are getting a preview of the Mobile App.
- The Mobile app will have supply Presence to the Hub. So today, if you deploy Life360 or any ofthe other 3-4 mechanisms for Presence, you are getting a preview of the Mobile App.
That's it.. 1-3 and all are available in some form today. Any expectation that it will be similar to SmartThings or Wink or Iris's mobile app is probably not the best plan.
Admin will remain local or, via OpenVPN (or equiv). And I can't say thanks loud enough for that. 