I believe they already stopped manufacturing them in some countries, if not most of them (Since i read that last year).
With the recent announcemend of the Psn Plus not giving neither PS3 games (or vita) it is kind of obvious that they will focus on the next console.
What remains is: Will the servers shut down? When?.
Honestly, I don't think they will remove access to the Store, neither our downloads, but we have already seen many games shutting their servers down.