Apple's new iOS 7 operating system for iPhone and iPad has been radically redesigned, abandoning the quasi-realistic or skeuomorphic interface of earlier editions of iOS in favour of a clean, flat, simple look. Here are my thoughts on why Apple - led in this direction by Sir Jony Ive - chose this direction for iOS 7.

Well, that was fun. It’s been a while since Apple managed to spring some genuine surprises at a big press briefing – the company’s secrecy levels tend to be tighter when releasing software, because it doesn’t need to spill the beans to a bunch of naughty hardware suppliers – and the intake of breath when the WWDC 2013 audience got their first look at iOS 7 brought back happy memories.

One of the few things that the rumour mill was certain about, of course, was that iOS 7 would look as flat as a Dutch pancake, thanks to Sir Jony Ive’s one-man war on skeuomorphic design: the little tricks that make a user interface look superficially like the 3D pages of a real diary, calendar or whatever. That theory was bang-on. But what do Sir Jony and Apple have against skeuomorphism? And why is a flat interface better?

Apple iOS 7 Calendar

For one thing, faux-3D design is horribly cheesy. More importantly, a software product as ubiquitous as iOS doesn’t need to fake it. Perhaps early iPhone pioneers found the idea of a Calendar smartphone app baffling, and Apple needed to reassure them by making it look like the physical equivalent. But that time, if it ever existed, has passed. Smartphones entered the mainstream some time ago. The world is comfortable about playing games on a phone, and Apple doesn’t need to trick us into thinking we’re in a real-life casino.

And skeuomorphism run riot can be actively damaging to the user experience. An interface's first priority is to be easy to use, and extraneous, 'atmospheric' visual detailing just gets in the way. The last thing you could call iOS 7 is messy. 

We’ll take an in-depth look at iOS 7’s flat charms once we get a chance to play around with it - here's where our Apple iOS 7 review will appear. In the meantime, catch up on the launch details in our first impressions preview, which sits on the same page until the review is written.

[Related: Will I be able to update to iOS 7 on my iPhone? | Apple iOS 7 announced at WWDC 2013 | How to update your iPhone or iPad to Apple iOS 7 | Apple iOS 7 for iPhone and iPad preview & first impressions | Massive iOS 6 uptake is good news for Apple's iOS 7 launch]

Apple iOS 7 Home screen