I agree with Branko2166, the only way Sony would cancel the PS3 is if they decide they don't want to make a PS4. It's possible, but not very likely unless Sony just can't adapt to the recession.
That's why I think Sony will be laying low. Not cutting prices until profitability is achieved. Profitability is the key word, even if it requires them to sell some studios. This will maximize the probability that the higher ups at Sony will let SCE survive until the recession is over.
Now for the other possibility, that they decide not to make a PS4...That's also possible. One thing's for sure: if they want the PS4 to be successful they need to do big changes at SCE. The current strategy does not work anymore with MS in the console business.
In conclusion, there's only one sure thing: SCE will go through changes.