from ipod creator tony fadell, the programmer smart thermostat creates temperature schedules to maximizey efficiency. that's it for our disruptor 50 list. if you missed any of our big reveals, you can find the entire list of companies and a lot more great content online at disr cnbc.com. >>> okay, let's trade some of the companies that could be disruptive. who am i going to start with first? what about you, tim? >> well, as a bloke, as the lead bloke here for this question, ultimately, you know, you look at the coal guys and they've already been disrupted. i don't think this is a place, unless you are talking about the companies like walter energy, where people are worried about the balance sheet, i think you have this priced in. i would look at exxon and these are guys, first, as a stock, this has been a massive underperformer. this is one of the best companies in the world but a company in terms of innovation, i think is doing the same thing a lot of these companies are. i think thirç is an opportunity in exxon. this, to me, at three times -- 3% dividend yield and valuation that's some