Being one of the few people genuinely narked by Sony's removal of the PS3 'Other OS' functionality and in light of other users successfully requesting refunds from retailers, I contacted Sainsbury's via email and explained my plight, referring to the EU Law detailing that goods must:
"Comply with the description given by the seller and posses the same qualities and characteristics as other similar goods, be fit for the purpose which the consumer requires them and which was made known to the seller at the time of purchase.
 This makes Sainsbury's as the retailer the responsible party.
 I required the use of OtherOS and the ability to play legitimately purchased games.
 This was an advertised feature of the Playstation 3 console which offered this functionality at the time of purchase.
Upon Sony removing the OtherOS functionality the product became no longer fit for purpose under  as shown above.
Upon Sony removing the OtherOS functionality the product was no longer as described by the Seller at the time of the purchase under  as shown above.
I received a slightly sarcastic voicemail stating that as the Other OS function wasn't listed on the product page when I bought the item [from the Sainsbury's website] I would not be offered any compensation, financial or otherwise.
Personally I think this is a bit of a weak argument - the Sainsbury's product page didn't mention that the console came with a power lead either but I know that the SKU includes one and thus I would expect them to provide a replacement a refund to the tune of the cost of a replacement should one have been missing.
Furthermore had I ordered the item over the telephone the operator wouldn't have read out the entire feature list to me, neither would they have any proof that they had. If I bought a Ford Mondeo online I wouldnt expect the description to state that the car has 4 wheels, yet I would expect it to as its a feature of the product.
I guess what I'm getting at is that if the product page doesn't detail the full functionality of the item I am buying then that's Sainsbury's problem, not mine and certainly not an excuse to shy away from their responsibilities as a retailer. Those are my thoughts, what do you guys think?
Thanks in advance.