I don't agree with your 4G comment, as its coverage is poor, performance is patchy and smaller files will still download quicker regardless of your max speed.
But your point about high res screens is definitely true. Hell, we first had 'retina' hacks and bigger images specifically for our phones! Why is a site going to want to serve up smaller files for screens with more pixels?
But your point about high res screens is definitely true. Hell, we first had 'retina' hacks and bigger images specifically for our phones! Why is a site going to want to serve up smaller files for screens with more pixels?