When I moved my main machine to a retina Macbook Pro, I was surprised to notice that the screen made my website images appear blurry. I had thought image sharpness would stay the same (or improve) since the physical resolution of the screen was much higher. I also thought that any resampling by the browser wouldn't affect sharpness since there was an integer scaling factor: i.e. each image pixel should get mapped directly to a 2x2 square of retina pixels. My assumptions were clearly wrong though as my ...