Well, this has been said in the CP thread, but PS3s will probably drop in price when the PS4 comes out, so there's some relief there.
Also, if you're going to buy a PS3 strictly for BB, why would you need a PS4? Unless you just want to have a next-gen console, in which case you'd be buying one anyway.
As someone who bought a 360 just for BB and some other FGs, this is kind of annoying for me as well. I'm pretty much going to have to box mine up so it doesn't collect dust.