An idea isn't worth that much. It's the execution of the idea that has value. If you can't convince one other person that this is something to devote your life to, then it's not worth it.
Joel SpolskySoftware development takes immense intellectual effort. Even the best programmers can rarely sustain that level of effort for more than a few hours a day. Beyond that, they need to rest their brains a bit, which is why they always seem to be surfing the Internet or playing games when you barge in on them.
Joel Spolsky