[kkarpkkarp]

> The new element syntax is perhaps the boldest choice

Probably to not break anything in older browsers which hasn't adopted it yet: new tag will be simply ignored, that's my thinking

> I'm amazed that they even put this in chrome, let along are saying things like "let sites use this new functionality right away even before this lands in other browsers"

It is behind the flag, like every other new proposal they made. Even though some dev would like to use it right now (for regular site visitors, not for self testing), she can't.

[nomsternom]

It's also a processing instruction rather than an element, which makes it possible to put it inside e.g. a <table> element and partially replace some rows.

[mgr86]

I think semantically this is the perfect choice. Considering the history and intended use of PI.

As an aside, I’m still rather annoyed that web components use hyphens. I really thought colon’s and namespaces made perfect sense there.