iOS 4.2′s major features include multitasking, folders, wireless printing, and AirPlay, the latter a renaming and expansion of AirTunes to include video. Of course, multitasking requires apps written for iOS 4, and can have the same drawbacks as on other iOS devices: performance and battery life. Folders are fine, and the enhancements to Mail, a unified inbox, threads, and opening attachments in third-party apps, will be great.
Minor improvements include Game Center, more language support for keyboards and dictionaries, accessibility enhancements, and improved security and remote management for enterprise. There’s also a welcome minor enhancement to Safari, allowing searching to “find and highlight specific words and phrases on large web pages.”
