We all know Apple loves to bang their Retina drum, but it would always be a matter of time before another company got close, or passed their technology. Considering that Samsung and LG make the Retina displays, it was purely a matter of time before one of the companies announced their own "Retina-like" display.
News has floated out that Samsung have developed AMOLED displays with a pixel density of 350ppi. ETNews reports that Samsung have managed to get this working by achieving a scalable manufacture of displays featuring pixel densities exceeding Apple's Retina technology thanks to the advancements in the Fine Metal Mask production technique.
There's no ETA on when these bad boys would arrive in devices, and thus, in your hands, but you can rest assured that they're being worked on. At 350ppi, the new AMOLED displays would easily beat Apple's iPad at 264ppi, and the iPhone 4, iPhone 4S and iPod touch with 326ppi each.