Having a 4K display in your hands sounds good!
Rumors pointed to both 2K and 4K resolution iPad Pro models in the works. Per the stories, Apple is prototyping a 2K model that would likely exceed that of the Kindle Fire HDX 8.9’s 2560 x 1600 (339 pixels per inch) and blow away the iPad Air’s 2048 x 1536 (264 ppi).
A 4K iPad Pro would likely come in around 4096 x 3072, beating the 4K TVs available today. Larger pixel count than that offered by many 4K TVs on the market, TVs with 55 to 105 inch screens! Pad News also claims that Apple intends to launch both of these prototypes in 2014, with a 2K version to come in April and a 4K model to launch in October.
Source: 4k.com | Techradar.com