I think Jobs should start out showing an iPad with a Windows XP UI on it. Just for kicks. Hype it like it's the next best thing with amazing features and so on. Then turn around and look surprised, claiming it's the wrong slide, and say he'll be firing someone for putting it into his presentation.
Then he switches to a new UI. Amazing graphics, with a list of OS features everyone has been begging for. Ubiquitous printing, a file system, a command line if they want. Oops... All the features Windows XP had when it first came out.
All mr. jobs has to do is look at the jailbreak community so see what these iDevices could be.
Won't though.