Yes, but the CDM cannot composit a page. These are things that happen often: - Layering elements on top of other elements - Layering elements behind of other

Yes, but the CDM cannot composit a page. These are things that happen often: - Layering elements on top of other elements - Layering elements behind of other elements - Transforming elements by CSS transformations Usecases of these are: - Playback controls - Advertising - Embelishments - Annotations/Coments - UI Animations The idea that the browser is some kind of "DVD/Blu-Ray player" is fatally flawed.