Just recently announced by Sony, a few major components will be receiving dye shrinkage within the next few months. The components receiving the shrink is the CELL and RSX. The heart and brain of the PlayStation 3.
What is dye shrinkage though? Its the process when the general core or cores of a processor and/or all the transistors are made smaller. Doing this reduces heat and lowers power consumption. Production costs are also lowered greatly as more processors can be made out of each wafer.