I hope SONY adds a number and attempts to stardise throphy points ( eg. must have 100 or 1000 or x points per game ... + all games require it)
I wouldn't mind though if they made it so that PS3 gamerscores had to be checked on the user's PSN account / maybe a highscore system -- this would help people compare their score with their friends while limiting the abilities and random players kicking you for a low score ...