Talk to Google - "OK Google" Advertising Campaign

Google doesn't do a lot of paid advertising, so when it does we've got a good clue that Google management is really committed to the product or service, at least for now (remember Google?). Google is currently running a "Talk to Google" campaign on TV and Radio in multiple European countries to promote voice driven searches using their "mobile" search app. I've heard a similar "Spricht mit Google" ad on Berlin's Radio Eins.