I suspect that both VR immersion and self-driving cars will always be "just around the corner." We want to believe in them, but in both cases there are obstacle

I suspect that both VR immersion and self-driving cars will always be "just around the corner." We want to believe in them, but in both cases there are obstacles that may be insurmountable or will at least force us to scale back our hopes. In the former (VR) they are technical/biological and in the latter (self-driving cars) they are technical/environmental. Or visual systems are too tightly integrated with our motion systems and other sensory systems to be handled independently, just as traffic lanes are too exposed to other influences (unpredictable people and things) to allow vehicular autonomy. In both cases we want to see the thing we want to do by itself but there are deep interdependencies.