First off, I think some of you are freaking out and thinking that just because they have filed a patent that means they are working on production units. A patent just saves their IDEA. This is probably no more than a concept at this point.
Secondly, I do not see how it could work as an add-on to current systems. There just isn't an input that is capable of handling the necessary data transfer rates on current PS3's. Not to mention they'd need to make it compatible with both the Fat and Slim models which means different adapters or different casing styles.
The only way I see this working is if they used the RJ45 port (LAN port) or multiple USB ports in conjunction and even then the latency of the data transfers back and forth to reach the multiple processors may hinder it more than help it.
An external add-on to increase power, I'm afraid, would do much more harm to their user base than good.
