I think I can address this.
Tankless Water Heater
This item costs quite a bit more than a standard water heater. Would 100% of our buyers want a tankless water heater? Bear in mind that it runs only off propane. So no more using AC power to heat water. That said, like you, there are a number of buyers that want, need and would pay the extra cost for the tankless water heater. I believe we're beginning to consider this. The reason I say this is that I was asked if I would be interested in trying one out in my new demo coach. I said yes. I will pick this coach up mid-May and will give Heartland feedback after using it for a month or so. Perhaps if feedback is favorable, we'll consider offering it as an option. I can't speak for sales or manufacturing, but this is my hope. Note too that all RV tankless water heaters will fit in the same space as the standard water heater - so this is a simple, yet costly upgrade an owner could do or have done. And, a brand new, never used dual fuel water heater has a lot of resale value, so there would be some cost recovery there if a buyer could be found.
Command Center Touch Screen
The price point on multiplex lighting and control systems has been coming down as more players enter this space. Heartland has trialed 2 such systems and at this time, a system from KIB is standard on the Landmark product. Note that we have elected to not have a central control screen on a wall that controls the system. Rather, we took the approach to have "point of use" switches, with some of those switch panels having the ability to control up to 6 items. Like you want, it's my personal desire to eventually have a system that adds Smart Device (phones, tablets etc) control of the system "in addition to" point-of-use switches. In this manner, the person who only wants wall switches as before, still has them and the person who also wants Smart Device control, has that as well. I am not privy to whether Heartland has any plan to add Smart Device control. Nor to I know if/when a multiplex control system will find its way into other Heartland brands.
Thank you for your questions. Which Heartland product are you considering?