Android is so far proving relatively popular with tablet manufacturers despite nagging concerns about fragmentation of Android's operating system, user-interface and app store ecosystem.

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That's not surprising as it's been among the few where the software giant has controlled "the whole widget" -- choosing the processor, designing the hardware, and developing not only the operating system and user interface, but a host of licensing standards, services and infrastructure supporting Xbox Live.

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Windows Phone 7.8 takes care of a number of bugs, tweaks parts of the operating system, and brings in the user interface elements from Windows Phone 8, notably the live tile system has been given the same flexibility as that of Windows Phone 8.

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