They're probably just integrating their
Matrix Airfare Search, from what it seems. So far, Google has quietly left that product out of "public view", so to speak...or at least, it doesn't seem to generate much buzz. I find it helpful, especially if I'd like to try another or nearby airport by an area I've never been to before, and sometimes I find travel deals my booking department doesn't see right away. Although, I've caught some cheaper fares by going directly to the airlines; knowing what times/dates/connections and comparing them side by side is both geektasticly neat and helpful to me.
The other odd thing is that it also tries to steer you to the nearest hub (it seems within 100 miles), so you can get a direct flight, and ostensibly, a less expensive one.
I don't like the addition into the Maps, because it assumes you'd like to randomly fly on odd days and times - this might be great for folks without time constraints, though. The idea of
"well, you could drive 430 miles, but if you don't mind waiting until Thursday morning, there's a cheap flight with a four-hour layover that might work" probably doesn't do more than hook away your attention.