The problem with the GPS stuff is the need for someone to build the models and a somewhat not brain-dead operator that can learn the system and not fuck it up along with site management that will buy in to using it. Getting harder to find any of those.
Those "smart" setups have the ability to program on the spot for simple tasks - like maintaining a slope or grading a ditch, but for anything more sophisticated, you're gong to need a model and also the support equipment to go with it - GPS base or VRS subscription if there's a network near you, or a laser base or robotic total station for it to reference off of. More stuff to fuck up or get stolen.
I'd be curious who is buying and successfully running those in the real world. Seems like maybe the mid-level residential and commercial sitework guys could make it work - like subdivision or big shopping center grading. Too small for the big dirt guys, and the little, single lot or landscapers would have a hard time justifying the extra cost.
I worked for a small-ish dirt contractor 15+ years ago and talked him in to buying his first D6 with GPS. I was the modeler, field tech and sometimes operator for it. But I also got to watch the superintendent in a matter of weeks go from saying "we don't need that shit" to calling me freaking out when a piece of hardware failed and the GPS went down and he couldn't finish grade for a few hours.