> 23M for both eyes doesn't seem that far off from [...] 9.3M
It's almost 2.5x the pixels [edit: was ~~resolution~~ which is incorrect]. How is that "not far off"? It's more pixels per eye than the MQ2P has for both!
2.5x the pixels is more like 1.5x the resolution in terms of the smallest features that can be seen - remmber that displays are two-dimensional and in order to halve the width of the smallest discernable detail like say a line you need to double the pixels in both directions for a total of four times as many pixels. On the other hand, it is going to be close to 2.5x the rendering cost.
It's almost 2.5x the pixels [edit: was ~~resolution~~ which is incorrect]. How is that "not far off"? It's more pixels per eye than the MQ2P has for both!