Well for North America, they wrote on the official ps blog announcing the price cut as just in time for the holidays last month. I assume that's the only statement that needs to be said.
But look at the wording of the headline that went with the announcement. I actually saw it on N4Gs and didn't even bother clicking on it until I saw someone mention it on Gaf.
PS4: Big Holiday Lineup, Lower Cost
And this is how they describe it:
'If you haven’t made the jump yet, and you’re starting early on your holiday wish list, I have good news – we’re dropping the price of the PlayStation 4 system in the U.S. and Canada. Starting tomorrow, October 9, you’ll be able to pick up PS4 starting at the new price of $349.99 USD / $429.99 CAD (MSRP).'
It's very carefully worded.
The PS5 Exists.