I'll buy several units just to start:
One for a portable tablet/reader/browser that will likely morph into a wearable computer.
A second for a home NAS.
A third for a garden irrigation controller
A fourth for a spare/development/lightweight browser/general machine.
Off-grid power generation controller, coordinating solar, wind, IC generators and grid/battery systems for reliability and efficiency.
Another for a dedicated electronic card catalog for my personal dead-tree library, running http://tellico-project.org/
A few more to drive several CNC machines in the shop.
Then at least one for a carputer, GPS moving maps(http://www.openstreetmap.org/
), engine management...
Of course, I'll need one for an open source autopilot project...
The ham radio uses abound...
Set top box with various game emulators and DVR, Mythbox/XBMC?
Robotics, from roomba to Quadcopter.