The pop-over and on-screen keyboard are similar to iPhone OS 3.2, I wonder what these concept photos would have looked like before iPad launched

I'm not sure how accurate this is, but Mashable said that the images were online before the iPad was launched:

<< Apparently, these mockups went live on Google’s developer site last Monday (two days before the iPad announcement), but no one noticed. >>

http://mashable.com/2010/02/02/google-chrome-tablet/

There was discussion at
http://blogoscoped.com/forum/166792.html

too.

Also

http://blog.missionrepair.com/2010/02/01/ipad-camera-rumor-becoming-a-reality-we-think-so/

Yes, I read these mockups went live 2 days before the iPad announcement as well...

http://blogoscoped.com/forum/166792.html#id166970

<< Apparently our tablet mocks have been unearthed. >>

http://twitter.com/gmurphy/status/8532279496

What: no camera here either?

so on a 3:4 aspect they put the tabs on the left, but on my 16:9 windows the tabs are on the top...

go opera.