The Future of Business?

I seems that many big companies are buying smaller companies (which are also pretty big!). With Facebook buying Instagram, Yahoo buying Tumblr, and Yahoo attempting to buy another company, it seems that the future of starting a business is going to be selling to the "big guys". Sooner or later, I believe that there will only be a couple of companies (like in Wall-E) that will dominate the others. What do you think?