Some things Chrome includes that other browsers do not: Pepper, Native Client, Chrome Web Store, WebSQL (Safari might have that one too), a native PDF viewer, SwiftShader, etc.
(People of course disagree on which of those are bad and which are good.)
It's only in the Dartium branch so far, I believe - not in trunk Chromium or release Chrome. But yes, it's another controversial feature that Google is planning to bundle.
(People of course disagree on which of those are bad and which are good.)