Not too long away for you.
I was thinking of setting up Assetto Corsa and Elite on both PC's, one running the Pimax
and the other running the Rift.
On Assetto I will load up both PC's on the same track at the same time and I will pick a point/sign on the track where I can clearly see with the Pimax, and then move the car on the other PC with the Rift and move that to where it can see the same point clearly and take a screen shot so you can have a visual representation of how much further the 8k can see.
I will do the same in ED with both PC's in the same instance with the ships side by side and sit outside a station and move until I can clearly see the station name by the grill with the 8k and then move the Rift to the point where it can see then take a screen shot from the 8k to see how much closer the Rift has to be.