I believe there is some use of this type of tech in competitive racing (Tripy) but my suggestion was aimed more at the recreational use of Roll Charts which seems to be growing lately around the world. It was also just a geeks' view of a way to enhance Rally Navigator's recreational use. As for the tech - keeping in mind I'm talking recreational use - it's not a problem to remote the control of the display using Bluetooth or WiFi. But, I don't think scrolling linked to the GPS would be an issue for recreational use. I don't believe the Monterra will need a Mapping application (craftycoder's) since it will have Garmin's but using his app to link via WiFi to DualSportMaps.com might be interesting for travel without a laptop.