Google builds a search engine, forces the competition to start improving.<p>Google buys a webmail service, forces rapid improvements in the competition.<p>Google builds a browser, forces rapid improvements in the competition (Firefox).<p>Google buys a smartphone OS, competition already doing ok but probably tweaked some things.<p>Google starts building an inexpensive fiber network, makes incumbents sweat a little.<p>Google buys a smartphone manufacturer, forces competition to improve.<p>Next up, probably a mobile telco provider.<p>Google's thing seems to be improving the transfer and display of ads. Somehow they've turned that into a benefit to technology as a whole. It's a business model built on disruption.