I love the example of moving the printers. For me, every time I get up from my desk for a couple of minutes, I get a little refreshed, and I come back more productive than before. Having to walk a little ways to get a print out is a great recharge to my mental batteries. A shorter walk would translate into less of a recharge.

Of course, I could also easily see how if you were focused on something, walking a long ways to the printer might be just enough of a distraction to make you lose your focus. I imagine short "breaks" like walking to the printer would effect everyone a little differently.