D3 Moment ?
Much more because it equates more to the Nikon D1 Launch and arguably events that unfolded into Digital Photography ....
The loss of the Mechanical Shutter to an entirely On-Sensor Electronic Shutter precedes more and more integration of imaging functions in silico....
I still remember both the D1 launch and D3 launch very well. While both of them set important milestones for (digital) photography, Nikon's lead never lasted all that long. The D3 was announced in August 2007 and at the 2008 Beijing Summer Olympics, people observed roughly equal numbers of Canon white lenses and Nikon black super teles. Prior to that, Canon totally dominated sports photography for a couple of decades. However, after a few years, past the 2012 36MP D800, Nikon was gradually falling behind again. It only took a few more years for Sony to take the lead for mirrorless and Nikon fell into 3rd place.
I am very glad to see the Z9, but the competition keeps on going.