For some perspective, my first personal computer, if you could call it that, was an MOS Technologies, 6502, 1 MHz CPU based, KIM1 purchased in 1976. It had 1152 bytes (~1k) of RAM, a 6 digit hexidecimal LED display, a 23 button key pad for program and data entry and initially had to be programmed using hand assembled hexidecimal code. If I remember correctly, it cost $595, a month's salary for me at the time. In comparison the Oculus Go is a science fiction fantasy come to life. And, while not perfect it is another step in the evolution of the man machine interface that will continue to evolve in richness and capability. I think that it is a milestone because of its cost and portability. In this day and age, milestones are quickly superceeded and the cost of a used Go will drop below $50 within the year as more capable competitors emerge. All the more fodder for the hacker side of me. Just my two cents worth.
You sound almost as old as me. My first computer was by Commodore Pet 64. You had to write the code then save it on a tape. Only worked about half the time. The progress since then has been spectacular. I agree this is a journey that really never ends.
The Oculus GO is a great step in the right direction.