Apple’s just announced the 15″ Macbook Pro, with a high-resolution 2880×1800 15.4″ display. They’re calling it a Retina Display, but if that’s the case, it’s not quite the first laptop to have one: Sony has had a couple of laptops with 220 ppi screens. On the other hand, no-one is producing a competitive mainstream laptop with such a high resolution now. For reference, the iPhone is 326 ppi and the iPad 264 ppi. [The Verge]