How would a change to a PS3Slim actually proceed?

[WiiStation360]

Sony (or MS in the case of a 360 slim) would want to:

1. Delay the announcement of the new hardware version until as close as possible to launch, not 3 months in advance.
2. Wind down production of the Fat version, and reduce inventory levels before the announcement.
3. When the slim is announced, add a software bundle to the fat version, and a drop to the same price as the slim version.  There is now a incentive to buy the older fat version over the slim version.  For example: PS3 Fat w/ Uncharted same price as PS3 slim)