Windows Phone 8 screenshots leak a week before Microsoft developer conference

Microsoft is going to unveil the next generation of the Windows Phone OS at a developer conference next week on the 20th, but it looks like the folks at Nokia Innovations have got their hands on some screenshots of the new OS.
The purported screenshots seem to suggest Skype integration in Windows Phone 8 and it looks like Skype is being integrated to such a level that the app will behave like a native calling app.
Another screenshot suggests RCSe integration in the People Hub and there is one showing a new camera interface including a slider for zooming and a toggle switch for switching between videos and stills.
There is also a screenshot of a new feature called Datasmart which we are guessing will be like the data usage monitor introduced in Android 4.0 Ice Cream Sandwich.
Of course, as it is with all these leaks, we cannot confirm if they are the real deal, but surely we can expect some of the above mentioned features to be included in Windows Phone 8.