I feel like it needs to go that way eventually too. Think of the advantages of being able to keep the "guts" of the fishfinders away from as much shock / water / vibration, and having the displays only having to display and touchscreen functionality. It'd make it so much easier to swap out a transducer or a head unit and not having to worry about pulling wiring everywhere. Like you said though, they are going to ride the high prices for screen size as long as they can.