I'm looking at how to make images look good on android and iphone devices with high pixel density, and I keep running across two ways to do it - one is to have separate stylesheets that serve up bigger images for hdpi phones, and scales down in the css to the right size.
The other is a suggestion that you serve everyone the hdpi image and scale down, and people with low res phones will still see a nice looking picture, they're just downloading more than they need to.
It seems like maintaining 3 different stylesheets (low, medium, high) is a huge waste of time so I'm leaning towards the latter. Is there any reason not too?