Motion changes the way we see

This summer I will be working at the Vision Sciences Laboratory at Harvard University.  I'm really interested to learn more about vision and cognition, so I was digging through their website and found this:

http://visionlab.harvard.edu/silencing/

There are a ton of cool visual illusions that I'm sure you've seen before.  This one is especially cool because you know exactly what's happening (objects are changing shape, size, color and brightness), but once they start moving you stop seeing the changes.  This phenomenon is called silencing. 


The silencing of changes in favor of paying attention could make evolutionary sense; after all, isn't it more important for you to pay attention to the fact that a predator is moving toward you than it is to know what color said predator is?