The Mean Streets of LA

My wife and I have always enjoyed detective, cop, and murder mystery shows.  From old classics like Columbo, Murder She Wrote, and Hercule Poirot to more recent fair such as In Plain Sight, Psych, and Castle.  So when a game like LA Noire gets announced, it goes to my must buy list.

What's it like?  It's not like any other video game that's been published in the last 10 years, perhaps 20.  Let me explain...