The screen of the new iPhone has 326 pixels per inch. That's more than what the human eye can detect at a distance of 25cm; apparently the limit is 300, beyond which dots become really too small. A first consequence is that anti-aliasing, the technique that fools your eye by artificially smoothing jagged edges, is probably no longer needed on this device. But more interestingly: the race is over. Phone manufacturers no longer have to compete for smaller pixels, ever.
This reminds me of the news on the radio, on May 15, 2005. The day before, helicopter manufacturer Eurocopter landed one of their babies on the highest point on the planet, the top of Mount Everest. They commented the exploit: "We're very proud of this world record. We're quite confident that nobody will do better than that in the near future".
Absolute records. Stuck on amber!