It's new, but it is an emerging standard. I am very glad Google entered the browser marketspace, not just because their browser is great (and fast), but because they are pushing the web platform forward. Microsoft has already said that it will "do the right thing" when it comes to html5. Firefox, safari and chrome are all on board, and still working out the details. It will take a bit of time before html5 has the same compatibility as flash (hell a huge percentage of people still use ie6), but it won't be that long before it is a big factor.
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