Remember Garmin TourGuides? Probably not. But, I used these to develop self guided tours for my clients and friends. They were simple enough - just POIs on steroids but with the advantage of being "lockable" to a device.
I'd like to see the next generation of Garmin Adventures combined with TourGuide features so that we could compile a New Adventure with POIs (TourGuides) and Tracks and Photos. These New Adventures could be locked or unlocked which would make them of interest to many in the self-guided touring business.
Of course the devices would have to be updated to handle New Adventures; maybe the On The Road folks would even play since they support/ed TourGuides.