The FAA updated their policy on the use of electronic devices under 10,000 feet on Thursday. Through the ruling they decided the use of electronic devices under 10,000 feet was safe, and suggested most US airlines would update their policy by the end of the year.
Both Delta and JetBlue received approval and updated their policies as of Friday afternoon.
American has now announced their passengers will have gate-to-gate use of handheld portable electronic devices as of Monday afternoon:
Exciting news, and we should hopefully see more carriers roll this out in the coming weeks!