Seems like I managed to miss the first one of these, but not to worry, we can watch both of them today! These videos are Maxis' first look at how the GlassBox tech they've built for the new SimCity will work. It's relatively light on details, but they aim to show off the actual underlying simulation and behaviour mechanics, rather than the visuals that the game will finally display. I love these sort of glimpses into the innards of a game, and SimCity is the kind of game that likes to display its workings on the surface - it shows that Maxis believes its fans will appreciate a more involved approach to revealing how the game will work, too, so that's promising. Go take a look.
Have a read of our visit to Maxis for more.