Source: http://gizmodo.com/dells-27-inch-5k-monitor-is-like-filet-mignon-for-your-1630946185
For those who like to really spoil their eyes, Dell's new 27-inch monitor services them a whopping resolution of 5120×2880. That works out to 14.7 million pixels in total, and 218 PPI. That's just a hair shy of the 15-inch MacBook Pro's 220 PPI, on a display that's nearly twice the diagonal lenth. Wowza.