I’m therefore excited to talk about some of the new functionality we’ve introduced in Windows 8.1: Since the launch of Windows 8, we’ve heard feedback from developers that you wanted the ability to do the same sort of entirely custom 60 FPS DirectX rendering where the app fully controls the swap chain and presentation timing to the screen, but without the layout restrictions imposed by SwapChainBackgroundPanel or the UI thread synchronization required for SurfaceImageSource.
While the SwapChainBackgroundPanel control provided a high-performance rendering solution that made it ideal for DirectX-focused apps like games, it has a number of restrictions: there can be only one active at a time, it always fills the full window, and it has to be at the root of the XAML page layout.
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