There's been rumor articles on a couple game sites about that, saying they'd block used games. Of course, those rumors were also around for this gen too, etc.
I don't think it'll happen, they'll continue doing what they can to discourage used games by including a bunch of one-time codes with games and pre-order bonuses, but the registered games thing won't happen.
At least, it won't happen while we're still using discs. Of course, for downloadable games we're already there and used is gone.
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One Piece: Pirates with style!
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