Call me cynical, but it would never happen. Instead, oil companies would take a lesson from Hollywood, and make every single oil well its own corporation, so any disaster would be insulated to a single small corporation that goes broke.
A Chumby One, with a small touch screen, WiFi and FM radio, was $99 on pre-order, and $119.95 now, so it's not impossible, if the screen cost can be kept down. I'd suspect $150 is a more reasonable number to shoot for, though.
I did it a few times when I had my window manager configured to use ctrl+alt+(#) to switch between desktop windows. Type something on desktop 3, ctrl+alt+4 to check something on desktop 4, ctrl+alt+3 back, hit backspace with my right hand to correct my typing before fully releasing ctrl+alt with my left... boom, down goes X.
Granted, I would do something like that maybe twice a year, with 7 hour a day use, but I have done it.
Competent people turn to violence much sooner.
The Production Code enumerated three "General Principles" as follows:
"If you can, help others. If you can't, at least don't hurt others." -- the Dalai Lama