Wut a fail dear sony.
Although future firmware updates wont stop the future dongles etc used to bypass security features, it can however update software so that PSN networks can easily ask for Hardware ID's.
And GPU ID's are not all the same, each one has a unique ID, you are thinking of something else like Hardware Manufacturer ID etc.
I had been able to make a trainer for some PS3 games a few months back, the difficulty was deploying it so people could use it.
Jailbreak was a good start due to possibility that homebrew apps could be used, but there was no real major development scene for it.
Then various forms of jailbreaks came out.
And now the rootkey, with the rootkey it is very possible now for any form of distribution of any form of trainer. If I did release any I would still remove the net play from the game so people can't use the trainer to get easy achievements, which is probably what most if not all would want.
And to think Pwiz/Chris thought it would never happen! LOL PWiz you have to realise that ol DABBY has contacts here and there and hears things
[Edited by DABhand, 1/7/2011 12:43:59 AM]
Start on the PC of course, not so easy on the PS3. Had to get a devkit with debugging software and learn some of the new mnemonics used for the PS3 for its ASM.