This device can act as central device for you to build your project around. You can build the Add-on for it as needed. Like Radio, GPS add-on etc. Do home automation.
The whole project is based on Raspberry Pi and Arduino. The schematics, 3D files and other bits and pieces are MIT licenced. So anyone can download them, improve it and contribute here.
You can build one for your own. There are only 2 PCBs and 5 3D printed parts. Order the PCB and build the 3D parts with your 3D printer or order them. Then build your own. Check-out whole parts list.
A Raspberry Pi UMPC. An open platform device to use and create. It is fully open-source hardware. So you can modify it as you wish. You can make your Add-ons like GPS, Radio etc and attach them. You can access all the ports of the Pi, and the back part is attached with 4 screws. It can hold a 4" or 3.5" touch screen. You can also have a physical keyboard attached via USB. It doesn't need a custom image of Raspbian. You can use vanilla Raspbian and install the LCD driver, that's it.
Take a look at this in 3D using AutoDesk Fusion 360 Online.
Below are some of the highlights of the features for this handheld device:
So make yours and help us to make a Community around it!