The new models, which sport a lighter, cooler RSX, are identified with the product code CECH-2101A and are apparently already in the new ModNation Racers bundles here in Europe, although we can’t confirm that.
Previous PS3s used firstly a 90nm graphics chip, then a 65nm one. The new 40nm RSX runs cooler, is more power efficient and presumably helps Sony further reduce manufacturing costs.
What does all this mean? It means if you were a bit weird and were waiting for these to appear on UK shelves, you can now satisfy your bizarre requirements – check that the product code is CECH-2101. Enjoy.