So the actual number of pixels used to display the pane containing your text is maybe 10-20% of the headset display's resolution.
I suppose you could display text directly on the headset display. But then you only have 2,560x2,560 pixels per eye, fewer pixels than a 4k display.
Edit: fell for their lies, the headset is only 2k per eye. The 5k figure is "combined", i.e. a marketing number.
I'm with you though: early headsets were low resolution but these modern ones are not. We can still use more pixels though, esp. for text work.
So the actual number of pixels used to display the pane containing your text is maybe 10-20% of the headset display's resolution.
I suppose you could display text directly on the headset display. But then you only have 2,560x2,560 pixels per eye, fewer pixels than a 4k display.