For more information regarding Curiosity's design and mission, see here.
You know, I dig this. I'm all about sending rovers and probes to other bodies in the solar system. However, the last generation of space exploration included the mission to put a man on the moon. If we aren't working towards that same goal in respects to Mars, then what is NASA for? Like Dr. Tyson says, "We don't name schools after robots."
Personally, I hope Curiosity saves Spirit. That would be cool.