Some of the Playstation 3s we played on at Gamers' Day were just sitting around on tables, like they would be at your house, but others were strapped inside the fancy PS3 kiosks that will be hitting stores in the near future.
At various points throughout the night they needed to revive hot and sweaty consoles. But I only saw them pop one of the kiosks open once. Inside? Another PS3. What the hell? So I'm guessing the one on display is just there for eye candy and to distract wouldbe thieves while the gooey insides of the kiosks actually houses the strapped console.