We had a quick hands-on with a prototype of the upcoming Bug Labs QWERTY module. The keys were tiny, requiring fingernail presses, but overall it felt pretty solid with firm buttons resistant to mistypes.
https://gizmodo.com/bug-labs-open-source-gadgets-getting-pico-projector-3g-5125563
The Bug Labs booth at the Sands Convention Center (see: coffee, exposed circuit boards and lab coats).