Chrome advertising is all over London
I was in London for a few days last week, mostly for BETT and also a look around the Olympics site. ( see previous posts )
Google are spending on conventional ads. Don't believe that street posters will vanish anytime soon.
No sign of YouTube or Google Maps at BETT this year. They were a sponsor last time for Heppell.net
So whatever it is they do is now consumer electronics, for a very general audience.