The new iPad to better handle the normal resolution images

I just got my new iPad (it is actually my first one so I have nothing to compare again ) and I have been like everybody blown away by the quality of the new screen. But after few minutes i leave apple wonder world, launch safari and go online and as everybody is blown away about how crap the images look. Every image is so blurry.

I have read many article online on how web developer could deliver high res images etc ... But my question is the following , wouldnt it possible to have better anti aliasing system in ios to properly handle the normal resolution images? At the end of the day the 1 normal res pixel should only had to be replaced by 4 high res pixel of the exact same color. But obviously it is not what is happening here otherwise we would see this blurry effect.

If anyone has any information about this topic I would thrilled to read about it.