Control. The problem with technological advances today aren't with the tech itself, it's that the burst of consumer users allowed people like apple to turn computing into a user prison where the user has no control. This then set a standard, and many people have grown up without ever using a free and open source piece of software.
So AR and VR and AI and virtual assistants etc, the main problem is always going to go back to the root of why RMS started GNU in the first place; because he saw the future of tech was a fight for control of the user. He was just a man ahead of his time and socially awkward enough that it was and is easy to dismiss him based on what are essentially ad hominem attacks.
The future I want is FOSS/FOSH, regardless of the tech!