At the rate advances are being made with flashdrive-based motherboards, I predict "computers" will be five-watt, fanless black boxes sporting various connectors and about the size of a thick paperback.
If you don't insist on having the thing play computer games or play back DVDs, the computing power needed for navigation, e-mail, a front-end for an SSB radio/PACTOR modem, and a clearinghouse for NMEA 2000 inputs is pretty parsimonious. You don't actually need a laptop, and if the thing is buried in cabinetry, you can pull out the flashdrive and bring it ashore or seal it up and stow it in some nook or cranny in order to foil thieves.
Can't sleep? Read my countdown to voyaging blog @
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