The Novena Laptop is a crowd funded opensource (hardware and software) laptop.
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Pro Optional heirloom case
There is an optional heirloom case available that comes with a built in keybpoard. The majority of the case is made out of wood.
Con Would be difficult to actually use in a lap
Being that the screen is on the outside of the device, a portable keyboard is necessary. Thus using on ones lap would entirely too difficult.
Con Processor is ARM based and slow
The device processor is ARM based which means it will be quite slow and will have limited Linux support.