Bar of Soap
One gadget that knows whether you want to use it as a phone, a game, a PDA? Yup – and of course, MIT has it!
The key is how you hold it. The device has an accelerometer so it knows which way it is being held (relative to the ground) and sensors all around it. Depending on how the user holds it, it automatically brings up the (hopefully) correct interface. The options include a gaming device, a phone, a PDA, remote control, and a camera.