More and more devices support HiDpi/Retina resolutions. This requires websites to offer images in a higher resolution.
Especially screenshots containing text (i.e. code, debug output) look fuzzy.
For instance: (left is what Rapidweaver makes of it, right is the original file - click to see full res image)
This could be as simple as having the image inspector offering the option to change size without resampling the image but adding WIDTH="" or HEIGHT="" tags to the created HTML. For instance:
<img src="some.png" height="50%" \>
Does this make sense?