Any company - big or small - is going to enter markets where they think they can make an impact. I don't think it's about being nice to smaller companies (and B

Any company - big or small - is going to enter markets where they think they can make an impact. I don't think it's about being nice to smaller companies (and BTW, Dropbox isn't that small any more). It's about what's the best fit for users, and having the market decide the winner. If Google make a product that can't compete with Dropbox's ease of use, they'll flounder, as have many Google products in the past (Buzz, Notebook, Dodgeball, Lively, Answers and so on). Sure - big companies have advantages of scale and cross-promotion, but small companies have advantages of speed and lack of bureaucracy. Competition is good for users, and arguably good for companies too. Nice just doesn't come into it.