Why doesn't Microsoft offer better HTML5 support for IE and Windows Phone 7? Seriously, what's holding them back?

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fuadchowdhury answered the question Why doesn't Microsoft offer better HTML5 support for IE and Windows Phone 7? Seriously, what's holding them back?

In developing IE9, we considered how different specifications are still evolving at different rates. IE9 supports technologies that, while not always finished, are developed enough to avoid the problems that WebSockets illustrate today.In the IE9 product, developers can expect site-ready HTML5 so they can take advantage of the best of HTML5 that is ready and can still experiment with emerging HTML5 with HTML5 Labs. By keeping these separate, developers get what they need without the negative consequences of co-mingling very different things in the same browser.IE9 offers support for the most relevant, real-world web patterns that developers are using today as well as the HTML5 patterns we expect to become more mainstream. By relevant and real-world, we mean the technologies with the broadest impact for browser users (e.g. CSS ahead of MathML). By support, we mean providing developers a consistent programming model that enables the same mark-up. The goal is supporting great new capabilities, ideally in a way that interoperates or will interoperate soon across browsers.This approach (along with its supporting points, like test suites and “same markup” as a goal) has garnered strong support from developers. It’s also resulted in some surprising headlines over the last year, like “Only Microsoft gets web standards” according to “Mozilla man [who] blasts Apple and Google for HTML5 abuse,” from The Register.In this context of unfinished technology, measuring how much HTML5