True, some Android devices do have Flash. The problem being of course that Adobe has stopped developing the mobile version of the plugin. (Not to mention cutting back their Linux development, transferred Flex to the open source community, etc.) I wouldn't recommend waiting for devices to support Flash, at least not as part of their browser.

It all depends on what you're developing and where you want to deliver it. Are you developing games? 3D content? It's possible to develop that in Flash and bundle it into an app, including an app that will run on iPhones.

If you want to deliver on the web, HTML5 is the way to go. Flash CS6 has an HTML5 export option (though somewhat limited), and Adobe is currently developing a tool called Edge (labs.adobe.com) that is similar to Flash.