"Each Xi3 device is made up of three separate modules: one for the processor, one for how the unit communicates on a network and a third for power. This means you can upgrade any of these components -- say, to swap out for a faster processor -- with little effort. Just unscrew the back panel, slide out the required part, put the hatch back on and you're done."

As long as Xi3 still exists. Once they die, you own a cool historical curiosity.