Google is more than the king of this age, according to this post by Rich Skrenta, co-founder of Topix.net, which is just one of the many search and news aggregator sites in Google's wake. It is the environment in which we operate, the technological air that we breathe.
Google has won both the online search and advertising markets. They hold a considerable technological lead, both with algorithms as well as their astonishing web-scale computing platform. Beyond this, however, network effects around their industry position and brand will prevent any competitor from capturing market share from them -- even if it were possible to match their technology platform.
To paraphrase an old comment about IBM, made during its 30 year dominance of the enterprise mainframe market, Google is not your competition, Google is the environment.
In case you forgot about life before Google, the kings of the first two ages of computing were IBM (1950-1980) and Microsoft (1984-1998). Google's reign began in 2001.
The interregnum between the end of the PC era and the rise of the online world has concluded, and Google is the new king of forward market growth in computing and software technology. Major companies will succeed by working within the framework of Google's industry dominance, and smaller players will operate in niches or in service to the giant.