I want an OS that I can plug into my brain as some sort of extension. Then I can give commands to by thinking rather than typing it on a keyboard or clicking with a mouse. I can think of the general principle that I want to accomplish, for instance calculate the googolth (http://en.wikipedia.org/wiki/Googol) prime number, and the computer then does the brute-force calculations. As when you think about it, I am good about thinking what I want to accomplish and how to accomplish it, but rubbish and error-prone in the process of actually executing it. Whereas the computer is not very creative in coming up with new ideas, but is excellent in executing mine. This does mean that the computer should distinguish main thoughts from day dreaming, otherwise this BrainOS could labelled as one that is prone to many indecent pop-ups.