Re: Number! It's the flipping number!!!
If we actually get displays with 120 pixels per degree, I think referring to an 'amount' of pixels might be justified, it'll be close to the equivalent of a glass of sand.
(A VR headset would need of the order of 10^7 pixels per eye, a very small sand pit might have 10^8 grains of sand, so a standard 250ml glass would have roughly the same *amount*)