The transition from the fragmented computer market in the 80's brought relief via standardisation into the clone PC and the rise of the Internet. Now it's fragmenting again into separate walled gardens.
The post-PC era that everyone keeps rabbiting on about is a battle between the big players. We'll all lose and be back to separate non-connected ecosystems, just like the 80's when you had a BBC micro and everyone else had C64's so you couldn't play last ninja...
Its already happened in the mobile space which consists of three ecosystems and some "promoted as ridiculous and unfashionable" old fashioned telephones.