I know this topic has been discussed a few times already, but every time a lot of people seems to misunderstand some very real worries. So let me say this: The Retina display on the new MacBook Pro is of course amazing - I'm glad Apple is pushing the industry forward. That said: Close this thread if you haven't been using Photoshop or similar tools to design interfaces, apps, websites etc. This is not meant in arrogance! Is it difficult to get an idea of how a non-retina UI interface (for instance a website) really will look on a non-retina screen, while designing on a Retina screen? I've made this illustration, which explains the issue: Hope to start a nice and thoughtful discussion!