Official announcements about Flash Player and Windows 8 Metro from Adobe and Microsoft.

Adobe Flash runtimes roadmap update.

Microsoft is currently developing Windows 8, which is the next generation of its Windows operating system. The operating system includes a number of different user interface configurations (desktop and Metro style) and targeted processor chipsets (x86/64 and ARM), which create a number of different development targets for the Flash runtimes. In addition, while Windows 8 Metro style is the primary interface for tablets and touch devices, it is also a core part of the user experience for Windows 8 running on desktops and laptops.

Flash Player release and debug players will be available and supported for Windows 8 Desktop and Metro style experiences on both x86/64 and ARM platforms. [more  via the Adobe roadmap for the Flash runtimes]

Microsoft blog post.

The Windows 8 Release Preview includes a new power-optimized, touch-friendly Adobe Flash Player. Adobe Flash content on compatible Web sites will now play in Metro style IE10. Metro style IE10 with Flash on Windows 8 enables people to see more of the Web working with high quality, especially compared with the experience in other touch-first or tablet experiences.

We believe that having more sites “just work” in the Metro style browser improves the experience for consumers and businesses alike. As a practical matter, the primary device you walk around with should play the Web content on sites you rely on. Otherwise, the device is just a companion to a PC. Because some popular Web sites require Adobe Flash and do not offer HTML5 alternatives, Adobe and Microsoft worked together closely to deliver a Flash Player suitable for the Metro style experience. [more on IEBlog]