Back in the crazy days before the current generation of gaming consoles, the console you bought at retail was the console you had for the life of the hardware. My SNES acts exactly the same now as it did when it was first released, and outside of the addition of Xbox Live, the first Xbox system remained largely unchanged throughout the hardware's life cycle. Those days are long over, and now which version of Sony's PlayStation 3 that you bought is only one part of the equation: welcome to the firmware wars.
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Source: Ars Technia