The Federal Aviation Administration has decided to release the use of electronic devices on airplanes, including during takeoff and landing. In order to receive authorization, airlines must submit reports that their aircraft are free from interference - but this is more of a legal formality than a technical requirement - the FAA has already determined that onboard gadgets are safe to use.
E-readers, tablets, video games, MP3s, notebooks, cameras… everything will be unrestrictedly released all the time, with one exception: cell phones, which should stay in “airplane mode”, ie without transmitting signal - because that would create trouble not in the air but on land. For now, the release only applies to US airlines flying in or out of the US. But it is very likely that the standard will be adopted by the flight authorities, and therefore by airlines from other countries.