So with "next-gen" not so next any more and with them using 8GB of unified RAM I would feel it's safe to say that next game is going to be 64-bit capable.

Currently the Creation Engine is limited to 32-bit evident by the 4GB RAM limit.

What do you guys and girls think, is a new engine needed and is it on the horizon? Will the engine just be a re-write?

Likely the same game engine but with enhancements made to it.

Also I think it will still be for the 360 and PS3 depending on when it is released.

Likely this is better suited for generic Fallout 4 discussion thread.

http://www.gamesas.com/topic/1509941-fallout-4-speculation-suggestions-and-ideas-230/