They do, the newest e-ink Kindles have 300ppi screens which puts them close to iPhone/iPad Retina display density. Most e-readers were only 167ppi in 2012, wit

They do, the newest e-ink Kindles have 300ppi screens which puts them close to iPhone/iPad Retina display density. Most e-readers were only 167ppi in 2012, with 212ppi just starting to hit the market in premium models.