Okay, it's dawning on me that maybe by designing my games with pixel art, then scaling the layout to 3x zoom and using a resolution of 1920x1080 might NOT be the best idea for performance. Or maybe there's no other way of getting crisp, non-antialiases pixels without using the native resolution of the device (usually 1920x1080 these days) and scaling the layout. I've only used this technique as a way to keep the pixel art scaled properly, but should I be using 320x180 window size, and just letting the tablet/phone GPU upscale, and hope it doesn't anti-alias the pixels?