I guess you work for garmin.
Garmin have ZERO experience with avionics. They just sell large screen GPS that everyone want because GPS is an output device. The fact that you can zoom/etc with touch is just because garmin have ZERO experience with avionics, and even then, there are some few hardware buttons there already. My guess is that the second or third version will have many more.
Another consequence is that the large GPS screen have to replace many components on the dashboard of a 2 seater plane, because they originally didn't have space for a large screen (most private planes flown today were made in the 70s!). by consequence, everyone gives up their radio etc with decent buttons because they really, really want a GPS with a huge screen, and garmin knowing this have to include a crappy radio etc in their unit. But given the option, everyone would want a bigger/modern dashboard instead and dedicated devices.
Just because something is selling it is not because it is good. See the "doctor killer" planes.