Hi John,
1) There are drivers for the EyeX Controller on Linux, but we will only have official support for Windows in the beginning. If there’s a big demand for Linux we might publish a basic unsupported Linux kit later on. What kind of use case are you thinking of?
2) So far we haven’t done so much testing on large screens, since the hardware is still under development. Probably it will work fine on most parts of the screen, but if you’re sitting near the screen and look to the top-left and top-right corners, the gaze angle might be too large for the tracker to be able to process the image. When we get closer to the release date we can publish more information about eye tracking on large screens.