The reason piracy isn't as bad on PS3 as it is on 360 is simple - PS3 was trully "hacked" a few weeks back, when the main code of some sort was found, I think now it's probably easier to pirate a game on PS3 than on 360, the only difference being that it requires a BluRay disk, which may halt piracy a bit taking the price of those disks into account.
In other words, PS3 has been hacked to shit, but not enough time has passed to see the full effects that it will have.
360(old models) have been hacked years ago, so it's obvious as to why the piracy is a much bigger problem now. - it had more years to develop, whereas the PS3 scene is new.
We'll see the effects of the PS3 hack in the future, around 6-12 months, and yeah the HW bump will probably be substantional as a result.
Disconnect and self destruct, one bullet a time.
