Layout Experiment

There's something calming about not letting a web app take up the full width and giving it space to breathe.

Take your favourite app and add to the body:

box-shadow: 0px 0px 40px rgba(0,0,0,0.1);
border-radius: 4px;
max-width: 1600px;
margin: 40px auto;

Does it change the way you think about the design? Is there a browser plugin to display websites like this?