I was unaware of this until recently, but I guess one really crucial issue for this discussion is that Adobe will no longer be developing the flash player for mobile devices following the release of flash player 11.1 for Android and Blackberry. See http://blogs.adobe.com/conversations...ash-focus.html

Our future work with Flash on mobile devices will be focused on enabling Flash developers to package native apps with Adobe AIR for all the major app stores. We will no longer continue to develop Flash Player in the browser to work with new mobile device configurations (chipset, browser, OS version, etc.) following the upcoming release of Flash Player 11.1 for Android and BlackBerry PlayBook.
They go on to say -
These changes will allow us to increase investment in HTML5 and innovate with Flash where it can have most impact for the industry, including advanced gaming and premium video. Flash Player 11 for PC browsers just introduced dozens of new features, including hardware accelerated 3D graphics for console-quality gaming and premium HD video with content protection. Flash developers can take advantage of these features, and all that our Flash tooling has to offer, to reach more than a billion PCs through their browsers and to package native apps with AIR that run on hundreds of millions of mobile devices through all the popular app stores, including the iTunes App Store, Android Market, Amazon Appstore for Android and BlackBerry App World.