When they drop support for the PS3, it does not necessarily mean that you will no longer be able to play from your PS3. It just means that they will no longer release expansions for the PS3, nor will they make updates and changes with the PS3 in mind.

I'd begin saving up to either upgrade your PC or buy a PS4, you have a while before support is discontinued. They said they're waiting until the number of subscribers on the PS3 are at a low. It may be after the next expansion, as an estimate.

Put away a dollar a day and you'll have a PS4 in a year.