This really creeped me out when I saw it on the dev channel - enough that after using Chrome exclusively since 2009 I've moved to Firefox.
I love searching through the omnibox (and will go to the omnibox to refine a google search result page I'm on) but there's something deeply unsettling about integrating Google Search and Chrome in this way - I can't quite put my finger on it but I think it's because the URL isn't shown