I agree (I made the video). There is actually bunch of thinking behind it, but we're leaving it rough because we don't want to pretend we're developing high-detail specs just yet, as doing so tends to lock you in to a certain approach - we really do prefer to experiment in code.

The point of the Chromium site is not to sell, but to be pretty open about what we're doing and what we're thinking early in the process so that our external contributors, who we value highly, can get access to the same information that our internal teams can and so that they don't get surprised by sudden public changes in direction.

It's a tough balance - not over-specifying yet being open, especially when people are used to everything a company puts out being a high-definition advertisement. This open development style is still new to me, and hope we'll get better at it with practice.

(FWIW, this is all personal opinion, not Google's).