The key to me is that you can run multiple queries against the same point in time, thereby having a sound basis for the data you are working with. Compare this to working with traditional RDBMS having to get it all done in a single query to have a coherent view of the world, or roll the dice by running multiple queries knowing that they all might not be running against the same view of the world.
http://thinkrelevance.com/blog/2012/04/26/thinkrelevance-the...
The key to me is that you can run multiple queries against the same point in time, thereby having a sound basis for the data you are working with. Compare this to working with traditional RDBMS having to get it all done in a single query to have a coherent view of the world, or roll the dice by running multiple queries knowing that they all might not be running against the same view of the world.