This is my Idea for Google...

Have a look at the stunning google street view.

Very nice view. Now give a closer look. On the right side there is Bill Board. But the left side of the streeet is empty.. In future what can happen See below

Now have a look @ the left sideof the street. It is not empty..

So google can easily sell their location based advertidement on this kind of virtual bill board. 

And there are a lot of added benefits. Like managing the adverts would be a lot easier than now. 

In the next century or a little before that when human driver less vehicles  will use google street view , then this virtual bill boards can play a crucial role in marketing.