I teach #leanStartup. I practice what I teach. I push entrepreneurs to be bold and try to hold myself accountable to the same standards on my own startups and ideas. I love helping entrepreneurs design and run experiments. @neighborrow taught me that there is a difference between a product that customers should use vs one they would use. @photogether_ showed me how to get from idea to revenue in a day. I travel the world teaching classes, mentoring, running workshops, etc.
As everyone on this thread has pointed out and as you probably already know, an idea alone is not worth anything. This is not just a cliche about execution, it is literally worth nothing you can prove it by trying to sell the idea itself (not your willingness to work on it or something else of value, but the idea itself). Read what Paul Graham has to say on the value of ideas.
Not only is your idea not worth millions, but one could make the argument that the net value of your idea is about negative $10,000.
As for the POTENTIAL that your idea, plus your team, plus your customers and the present value of your future cash flows based on all of these things coming together, THAT is based on execution. And in my opinion the best way to get execution right is to go out and start running experiments to learn about and acquire customers based on the value that you are creating for them.