What features are missing from Silverlight presentation markup that will be supported in WPF (Windows Presentation Foundation)?

Some high-end Windows-specific features of WPF, such as real 3-D, hardware-based video acceleration, and full document support, will not be supported in Silverlight. This is by design to support Silverlight's cross-browser, cross-platform reach scenario, which demands a light-weight plug-in. However, Silverlight will offer a uniform runtime that can render identical experiences across browsers on both Mac OS and Windows.

In addition, because both WPF and Silverlight support XAML, . NET, and role-specific tools namely Visual Studio and Expression Studio, designers and developers will be able to use the same skills and the same tools to build continuum user experiences spanning connected desktop applications for Windows to rich interactive applications/media experiences for the Web.

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