https://www.gamespot.com/articles/ps4-update-505-out-now-heres-what-it-does-not-much/1100-6456187/

There's no word yet on when we'll be able to change our PSN usernames--a feature much-requested by the PlayStation community. However, Sony hinted at PSX that this capability may arrive within the year. In other PlayStation news, Sony recently revealed a new Monster Hunter World PS4 Pro special edition, while the glacier white PS4 Pro is finally coming to North America.