When saying Flash, I was referring to web video like Hulu. Runs much smoother in WebOS. Neither Android nor WebOS has problems with other flash elements on websites. Also, in WebOS I love the switching between windows and real background multi-tasking. That is why I am itching to try out Cornerstone in Android once they have upgraded to Alpha 2.
If they had followed through on that "Android apps running under WebOS" idea, I would stay with WebOS. Even though I have used Android for years, WebOS just seems more natural to me. Though I miss widgets.
In the end, apps are important. And even if they exist in WebOS, they often offer a lot less functionality than their Android equivalents.