I don't get why this is downvoted. You are right. At least Google explicitly marked this as a "Chrome experiment" instead of labeling it as a "HTML5 showcase".

How are you seeing the vote count? I don't see a way in my profile to turn it back on

[Edit to add] It's a serious question. Parent refers to downvotes of GP post. That makes me wonder if there's a way to turn the numbers back on. Something I would very much like to do.

Why the downvotes?

I'm guessing that at one point the post's text was gray due to downvotes.

Maybe because Google constantly markets itself on its use of open standards.

If that's all you get out of it, then you're intentionally ignoring the years of talk about "openness" from Google and its criticism of competitors who don't adopt open standards.