However great the Apple iCloud (and indeed any cloud based services), it will still have a fatal flaw; its Achilles' heel remains its dependency on mobile phone operators especially when on the move and roaming around.
iTunes in the Cloud for example allows you to automatically download new music purchases over Wi-Fi or 3G while most data traffic is expected to be handled by Wi-Fi, be it personal or wireless hotspots, according to analysts.
Steve Jobs' mantra at the WWDC keynote was that Apple was moving to a Post PC era, one where devices are untethered, cutting the USB & Ethernet cables and relying as much as possible on wireless networks.
Apple must have taken a calculated risk by assuming that users that will embrace the iCloud services and have regular access to reliable and fast Wi-Fi networks or otherwise they will be clamouring for the good ol' cables.
In the UK, only O2 and BT offer unlimited Wi-Fi access via their extensive Wi-Fi hotspot networks and even then, getting hold of a signal, especially in a crowded area, is not guaranteed.
Orange and Vodafone both offer metered Wi-Fi data allowance while both T-Mobile and Three UK do not currently offer Wi-Fi access with their smartphones. No mobile phone operators, other than Three UK, are offering unlimited mobile data plans and all the other major carriers have enforced a maximum of 1GB data allowance on their iPhone price plans.
This means that if ever users have to sync their iOS devices with Apple's icloud using a means other than Wi-Fi, they may find themselves facing a hefty fee for over usage or simply being unable to use their data allowance as freely as they'd wish.