Unless you can create code for the ps3, then this is useless to you. If you could program some code to boot iso files then you would not be here reading this now! Using this exploit, you could run code that you have written. Problem is, Sony will probably leave things as they are and wait for somebody to write some code that boots iso's.
Soon as that happens, they will release an update deleting the inserted iso bootloader code. But maybe, hacked firwares could keep up with Sony's updates. In fact, if somebody could write some code that could update the system with hacked firmwares, maybe that could 'wedge' the door open, preventing Sony from shutting it.
I think you can say goodbye to online play if things get this far. Hacked PS3's will probably have to be quarantined from PSN and the net.