Plans for 64bit physX and engine support

Hi, I would like to know whether there are plans or not regarding using PhysX in 64bit mode (it this works?) and convert UE4 to use it as well… (or maybe have the choice between doubles and floats in the editor? in the actors or whatever?)

I doubt that I will hear anything positive about that, but I would be grateful if you could tell me about it.

Thanks,
Erio