Is there any benefit to providing specific customisation beyond pleasing a subset of users who have a proprietary retina display?
I feel slightly at odds with providing something that can only be enjoyed by people who choose to purchase from a single manufacturer.
OP here. Retina displays are catching up really fast and it is not tired to Apple at all (although the term is). A retina ready blog will look better on most new HD-ready Android tablets, like the Nexus 7 and the Kindle Fire HD, and phones likes the Galaxy S III many others.