How so? I think that the ratio of "pixels" to the displays pixels needs to change given the resolution of the final display device. What shouldn't be happening

How so? I think that the ratio of "pixels" to the displays pixels needs to change given the resolution of the final display device. What shouldn't be happening is the viewport scaling -- instead the viewport should change its size to match the display device and upscale/downscale (without smoothing) along an integer multiple to achieve the desired effect