Instead of reducing the screen size (which Apple may not be able to do successfully), the body has been trimmed, giving users a device that is almost entirely made up of the display.
The other reason has to do with the status of theatrical exhibitors as the weakest link in the 3-D process. (Some theaters have already been caught reducing light levels on the screen to extend the life of expensive projector lamps.) What happened to me and others at the ArcLight the other night was the height of absurdity.
The MEX-BT5000 acts as a hands free kit for any Bluetooth phone (although we're sure they'd prefer if it was one of their own), giving you access to up to 50 of your contacts and six of your speed dial entries through its "high resolution" screen and integrated noise-reducing micophone.