Just had a read of this article, and it is concerning from many angles.
PC Games have for a long time been non-tradable by companies like EB-Games, Gamestop, etc however console games have made up a large portion of the business performed by these companies. What Sony are looking at doing will potentially make new-generation games untradable also.
The Article: Sony patents tech to block used games - GameSpot.com
I know the first thing I do when I am looking for a game is see if there is a pre-owned copy of the game available. This also allows for us older bunch to go through and buy games for our PS2s, XBOX (original), etc and as time goes on, PS3, 360, etc.
Any thoughts on this?