Blur to me is used for a sense of speed or scale. If you want the scene to look miniature then use blur. Look at a camera it usually goes from 30 feet to infinity, (10 meters for metric people) so if you don't have anything within 30 feet no blur.

The wit of a misplaced ex-patriot.
I cheated on my metaphysics exam by looking into the soul of the person next to me.