I neither said it was "no big deal" nor did I mean to imply it was "no big deal". I only stated what can be done now, and is being done now. Did you previously know they have systems to automate license plate tracking? If no, now you do.
edit - the databases are not national, they are precinct specific, each precinct sets the retention time of a database entry. This is assuming they have the ALPR systems to begin with, most don't.