The subject is not new: we talked about it a lot when we waited for the arrival of Mac OS X 10.6 Snow Leopard (1, 2), but it has been a topic on the agenda for a long time possibly since 10.4 Tiger. And it seems to be only now, in 10.7 Lion, that the thing will really take revenge.
Nothing was officially said at the launch of the Developer Preview, earlier today, we didn't even find anything in his release notes, but the MacRumors states that the operating system is already being prepared to become resolution independent (Resolution Independence).
Drawing on the idea of ??iOS itself (again, ?back to the Mac?), Apple can now allow developers to create images with twice the resolution of the current ones (so-called ?HiDPI display modes?), in order to prepare your apps to support future ?Retina displays? also on Macs. A 15-inch MacBook Pro that today runs at 1440 × 900 pixels, for example, may offer a resolution of 2880 × 1800 pixels in the future.
As with the iPhone 4 and iPod touch 4G, in practice the interface elements remain the same size. This changes your level of definition / details, as the pixels become much smaller. Retina screens are called so because, with the naked eye, it is impossible to see the pixels of the display.
The MacBooks Pro launched today do not bring anything new in this sense and it is possible that we still see some Macs arriving with ?conventional? screens (even the current ones are already a ball show), but the trend that, in the coming years, all displays of manufactured products by Apple follow this trend Retina.