"Software updates fix bugs, enhance performance and add new features," says Richard Lai, editor in chief of consumer tech blog Engadget China.
"It's up to developers then to take advantage of the new tools in their apps."
Users of the iPhone 5, iPhone 4S and iPhone 4 will be prompted by Apple to update sometime this month, while iOS 7 will be available for the second-, third- and fourth-generation iPads plus the iPad Mini later in the year (rumored to be October).
As for whether an iPhone packing iOS 7 is a worthy alternative to the slew of other smartphones, it comes back down to those nice new photo/camera features and the apps.
Great travel apps for iPhone such as Skyscanner flight booking and TripAdvisor guides are usually also available for Android, while major apps such as TripIt travel organizer and Skype calling will also support Windows Phone and BlackBerry.
For current iPhone owners, iOS 7 will make photo organization simpler, but it won't revolutionize their next trip away -- the next generation of iOS 7 apps could.