An early version of an iPad app acted as a mastercontroller, and I watched in awe as each input was simply shuffled around on both the app and the various monitors.
We use a Buslogic FlashPoint LT card to evaluate the SCSI drives, and we install the IDE drives as slaves to the DVD-ROM drive's master on the integrated IDE controller's secondary channel.
Chip-scale sensors already tell an SUV's master computer when the vehicle is about to roll over and the Wii game controller when the live player wants to swing the virtual bat.