From Thraktor on NeoGaf:
Assuming the rumour's true, and nothing changes from dev kits to final hardware, you'd be looking at 236 PPI, which is a pretty nice spot to be in for a handheld (going much above that gives pretty poor returns to scale for the increased computational burden).
In comparison to some common modern displays:
Dell P2715Q 27" 4K Monitor - 163 PPI
MS Surface 3 - 213 PPI
Apple Retina iMac - 218 PPI
Apple Retina MacBook/MBP - 220-227 PPI
Nintendo NX (rumoured) - 236 PPI
Apple iPad Air/Pro - 264 PPI
MS Surface Pro 4 - 267 PPI
Apple iPhone 6s - 326 PPI
Samsung Galaxy S7 - 575 PPI
Assuming the screen size is correct .... 236 PPI wouldn't be too bad at all. It's close enough to an iPad Air/Pro and a bit higher than a Sony Vita (220 ppi).
Now we just have to hope Nintendo doesn't choose a really shitty screen.
