Microsoft  will give consumers a taste of this mobile operating system by using the upgraded tiled interface from Windows  phone 8 in the new Windows Phone 7.8. This OS will be launched in Lumia 900—the latest in the Lumia series. The main reason why you don’t see Windows Phone 8 taking over the global market is because of its hardware requirement. Microsoft has always been very stringent with hardware profiles  before it gives away any contracts pertaining to its OS. Nokia and Samsung have had to come up with some brilliant phones just to accommodate previous Windows mobile OSs. Windows Phone 8 needs dual core processors, NFC, higher screen resolutions and more RAM (just to name a few) to run smoothly. This is simply not possible today as current phones lack this hardware profile. But do not be disheartened, Microsoft is kind enough to release the homescreen of Windows Phone 8 unto Windows Phone 7.8.