First iOS7 walkthrough: Video

9to5Mac has published a clip highlighting all of the user interface changes owners can expect when they download the next version of Apple's mobile operating system -- iOS7 -- to their iPhones.

The six-and-a-half minute video focuses on design and graphical changes -- rather than going into heavy detail on individual new settings and features -- but gives the best sense yet of how the updated OS will look and feel when installed on an existing phone.

For iPhone owners worried that they are set to lose a host of their favorite standard and in-built apps, there is nothing to fear -- the weather, stocks, note-taking, reminders and compass apps are all still present and correct, they've simply undergone a visual facelift.

However, the improved presentation and functionality of Safari -- Apple's smartphone web browser -- and its calendar app should be welcomed by all existing iPhone owners, whether they are fans of Jony Ive's minimalist, anti- skeuomorphism approach or not, such are the improvements in terms of use and clarity.

Steve Jobs was a big fan of skeuomorphism -- making virtual objects appear like real three-dimensional objects -- partially because he saw it as a way of helping the uninitiated understand how a feature, setting or app worked, and what it was for. That's why the notes app looks like a yellow legal pad and why the compass, when launched looks like it has come from a ship.

But both the iPhone and its interface are six years old and the smartphone is no longer an emerging technology. And, with iOS7, the iPhone now once again looks and feels as fresh as it did back in 2007 when it was first unveiled.