I had the good fortune to meet Robert Ballard a number of years ago at a seminar. He's the guy who found the Titanic in the first place. During his talk he outlined just how little of the ocean has been explored - and almost none of the exploration was south of the equator. Ballard has been a big proponent of ocean exploration for a couple of decades now.
I also remember the TV show SeaQuest DSV. They made a similar call to explore the seas until it went all Sci-Fi.
And now here is James Cameron going somewhere that hasn't been visited in 50 years.
I guess my question is what are we going to do about it? Space exploration captured people's imagination. But ocean exploration...not so much. Why is that? I really think we have a lot to gain by going to our oceans. Maybe this will help to awaken the sense of exploration that seems to have faded since the Apollo missions.