It would be amusing (and annoying, of course) if Google started adding virtual billboards to these street-level views and selling ad space on them. Say with an

It would be amusing (and annoying, of course) if Google started adding virtual billboards to these street-level views and selling ad space on them. Say with an algorithm that would pick out large enough pieces of blue sky from the images, and paste in realistic-looking billboards that would obscure only the sky so as to not render the views totally useless...