How long do you think Sony will keep the Playstation Store on PS3 running?

Sony still allows you to make purchases for your PSP and the Playstation Store uses the same servers for all devices so I can't see it being taken offline anytime soon. What do you guys and gals think regarding this matter?

Until no more players stop playing on the system.

Probably forever we dont know, im therectically guessin 4 more years

@Brian2030 I'm guessing two to three more years from the PS3 itself, but you might still be able to purchase PS3 games from the web version of PSN for a period of time after that, much like purchasing and downloading games on PSP still works today even though PSN is no longer accessible on the PSP itself.