For me it's about the wife acceptance factor. Having a single app that can be used opening the dashboards and for notifications makes it easy and clean.
On the Wink platform for example you can do widgets on the Android home screen. So she can pull up to the house, open the home screen and tap the 'Open Garage' icon. See my post from a while ago - iOS, Android and other client Apps
Yes that kind of functionality can be replicated using Pushover, cloud dashboards, and IFFT widgets but it's not nearly as nice. None the less I really like how Hubitat is progressing - just purchased my 2nd hub now 
