That's a little like tracing computers back to ENIAC, sure it's the same concept and can do some of the same things but there are worlds of difference between it and a personal computer.
Even if you limit scope to only consumer grade VR there's still examples from the mid-nineties of strap-on headsets. The jump to wireless has also been a generational leap, despite its tradeoffs. So by my count this is the 3rd generation.