Just to be clear by my understanding they have said something like "It can play pre-owned games", but have had to go back to marketing to find out exactly what that means, i.e. You can play but you need to pay �15 to unlock the game to play again.
I'd imagine there will be no firm announcement until Microsoft tell us about there console and how it will handle pre-owned games.
And bare in mind the original PS3 let you install linux on it and indeed they made abit of a song and dance about people using PS3's as server farms running other operating systems, something which they then removed as an option in a following update