Warbler said:

I guess. It's just Robin wasn't a cop, he was a trapeze performer. And his first name wasn't Robin, it was Dick.

Well I don't think Blake is supposed to be Robin. I think they just threw in that his real name was Robin as an easter egg that let's you know you will follow in Bruce's footsteps. I think some people think it's meant to show that he actually becomes Robin, but I think it's clear that he becomes Batman because 1) everything at the end points to his becoming Batman and 2) what kind of a superhero would use their own name?