The battle between Apple and Microsoft in 1994

http://en.wikipedia.org/wiki/Apple_Computer,_Inc._v._Microsoft_Corporation

Apparently, they seemed to have lost the battle as there are more users using the Microsoft Window interface compared to the iMac interface.

16 years later,

A battle between Apple and Google has started.

http://gnemsty.blogspot.com/2010/05/is-this-start-of-death-of-android.html

Will the iPhone suffer the same fate as the iMac?