Html 5 trying to integratin the HTML & XHTML

HTML5 is a response to the observation that the HTML and XHTML in common use on the World Wide Web is a mixture of features introduced by various specifications, along with those introduced by software products such as web browsers, those established by common practice, together with many syntax errors in existing web documents. It is also an attempt to define a single markup language that can be written in either HTML or XHTML syntax. It includes detailed processing models to encourage more interoperable implementations; it extends, improves and rationalises the markup available for documents, and introduces markup and APIs for complex web applications.
Apple uses this HTML5 instead of flash and gives the reason that flash is too slow and takes away a bit more chunk of its memory.
Will the apple succeed in its strategy ?