I really doubt I'll be getting the PS4, and my PS3 has been a good little media box/PS1&2 emulator for the past 6 years... so it's probably not going anywhere until I have two PCs that can emulate it (desk rig and living room rig). As things stand, my desk rig is only marginally faster than a PS3 (built in the same era) and my living room rig is... slow. (FM1 A4 APU, only good for video playback and retro gaming).
...also, when it gets retired, it's only going to be hooked up in the attic alongside my 2600, NES, SNES, Genesis, PS1 and PS2.