[adammarkey]

HTML 5 is part of the death-recipe for these native RIA technologies, but there is one other major missing piece at the moment - a fast and dependable javascript engine that can be assumed to exist on client machines.

HTML 5 just provides the UI / Drawing capabilities, but it will have to rely on Javascript perform the processing logic that is necessary in most Rich Internet Applications.

So, when it can be assumed that HTML 5 is fully implemented AND there is a fast enough Javascript engine to rival native code (similar to .NET in silverlight, actionscript in Flash, and Java in JavaFX) - then then open web will truely take over.

And personally, I cannot wait for that day.

[intranation]

We're also missing an IDE as "good" (relatively) as Flash, because at the moment there's no end to end production tools that can produce the rich experiences users can expect from Flash.