You would be surprised. VR/AR can present 2D surfaces that appear to have a much higher resolution than what the LCD should be able to do natively. Because you (ideally) have two eyes (cameras/view frustums) and they're always moving slightly, the virtual canvas is sampling the source texture's pixels slightly different per eye and per frame (e.g. at 90Hz or higher). Between the images your eyes see and the high-frequency changes always happening, your brain pieces together all of the detail.