I'm sure Warren Buffet will disagree with that generalization of all companies being tech companies, especially since he, the quintessential value investor, doesn't consider Berkshire Hathaway as one.

Neither would Carlos Slim. Not that it means anything but at different times, each was once adjudged the wealthiest in the world.

Calling a company a "tech company" speaks primarily to its competitive advantage in printing money, not the industry it is in.