While the PlayStation 4 (or whatever it will be called) will no doubt be revealed in the coming days, Sony has chosen to hype up its fans by releasing three retrospectives, looking back at their three previous home consoles. These videos show just how far the gaming industry has come in the past two decades and is a crafty way to get gamers to reminisce about the good memories they have with the PlayStation brand (most probably have at least a few) before the next PlayStation drops.