There have been numerous on-going discussions to favor which are the best templates for Joomla, themes for Wordpress or Drupal. However, there are none related on how to demo those great templates/themes in their best shape.
As one of the top Joomla template providers in the industry for the last 7 years, JoomlArt.com has changed the demo site presentation at least 5 times: starting from a very simple demo toolbar without any fancy animations, graphics to an extreme sophisticated toolbar including cool animation, screenshots and intro texts.
From the recent experience, we have had the urge for a simple generic design, which would compliment with the rest of our current design and make it a global top bar across the site. We were actually inspired by the way Google updated its top bar and even Mashable had a similar simple one as well in which helped us to update our demo toolbar like what it is now.