A little phantomjs script to emulate a large cinema display if you're working on a laptop or smaller screen.

emulate-cinema.js

var page = require ('webpage').create();

page.viewportSize = {
  width: 2560,
  height: 1440
};

page.open('http://seesparkbox.com', function(status) {
  console.log("Status:", status);
  if(status === "success") {
    page.render('cinema-size.png');
  }

  phantom.exit();
});