Cubase 6 64bit and ReWire

Is 64bit ReWire something that not going to happen until Cubase 7 or 8…or maybe never?

I believe Reason 6 is going to support 64 bit ReWire operation, but for the most part I think 64 bit ReWire support depends on the slave and not the host. I am curious to see if Ableton or any other ReWire compatible programs already support the feature in 64 bit.