Shut up geek, can't you see this imaginary couple is in love? I think you touch on another unstated reason for this ad. You could see it in the Youtube comment

Shut up geek, can't you see this imaginary couple is in love? I think you touch on another unstated reason for this ad. You could see it in the Youtube comments... people were saying things like "yeah, Google will take over the world, but when they do I will be cheering it on... they're awesome". People are clearly struggling with this increasing unease they have about Google and online services while embracing them more and more every day. This ad helps them get in touch with their positive feelings. Which is not exactly a lie, but it serves Google's interests.