Clearly this is the truth. Except (and I'm being quite serious here) to those who just dropped a big chunk of self image into their new toy. There's a huge psychological investment to a product like this. It's better! And anything that prevents it from being/seeming/acting better is an abomination. Marco Arment is deeply, personally offended that site designers aren't improving their work so that it looks better on his personal screen, because that situation reduces the value of the thing he so admires.

The iPad 2 does not have a retina display.

Indeed. The iPad 3 is here for what? 6 months now? And still websites that use lots of images don't look nice but again, so what?

I think the iPad 3 numbers and now retina MBP are so small that the extra work and bandwidth are not worth the trouble. Not now and not in the next couple of years IMHO.

Who will drive this change? Windows computers I think since there numbers are way more than Mac computers, even if Apple tells you otherwise.

Just my 2¢.