If EA makes a console, they won't make anymore 3rd party games, which is where their money comes from.
I doubt EA will make a console, maybe Apple, still doubt it.
I think this generation, all 3 company's will stay.
Next generation, same.
Generation after that, I think one will drop out.
Its really hard and expensive to compete with these company's.
I own all of lastgen systems as of October 2008. (Finally got a Dreamcast)
I own every currentgen system except PS3.