With virtual reality (VR) headsets being more or less up in your face, resolution is important because it means that the pixels are less obvious which in turn can make the experience more realistic and immersive. The good news for those who are PS VR users is that there is a chance that the next-gen VR headset from Sony could get some pretty insane displays.
Japan Display has recently announced the creation of separate 1,001 PPI and 803 PPI displays that they have designed specifically for use in VR. These are incredibly high resolutions which when viewed in close proximity should get pretty damn realistic. Given that Japan Display is part Sony (it's a joint venture between Sony, Hitachi, and Toshiba), it has been speculated that these displays could potentially be used in the Sony PS VR 2.0 or whatever Sony plans on calling it.