They wouldnt, not to a potential customer.
You just kinda have to guess from what they say in finance statements and those of suppliers.
They will never come out and say we" are releasing an upgraded product that is better and costs the same in a few months" because you would simply wait a few months for it, which is bad for them.
If its going to have a financialy material effect, they are legaly bound to release the information to the general public, but if its not, they will keep it secret as much as possible.
So, we know, kind of, that there will be a new code named PS3 by christmas, but we have no confirmation of what it will be, just speculation and deduction