I love HTML5, too. And ES4. And CSS3. I like reading their specs, and articles about them, and flame wars on their mailing lists. I can't wait for them all to catch on. I don't care if any open web technology impinges on Flash's turf - with Video, Canvas, WebGL, Transitions, and fundamental changes to ES/JS - or even overtakes Flash. The author of the post said as much, and I know plenty of other Flash devs that agree.
I don't know what Flash developer gave you the impression that they don't want to be part of the web. I don't know why you seem to think that's "what they seem to want". I have a feeling you're scoring some easy karma. All I'm asking for is: Can we have a little less "They took our jobs!(2)" in this discourse?
(1)I have complex feelings about Flash being closed source. On one hand, I believe the web should be open. On the other, I believe open-sourcing it means Microsoft builds its own version, forks it enough to cause a fractured development space, gains a near monopoly and then lets it stagnate for seven years (sound familiar?).
(2)Just to clarify: I'm quoting from South Park here; using it as an illustration of the simple-minded populism I see a lot of. I don't believe Flash devs take HTML devs' jobs -- other way around, in fact.