If things remain as they are. I would expect the following in the next 6 months:
PS4 wins in North America & UK, completely dominates everywhere else.
Xbox One remains healthy in North America & UK, drops to Wii U levels in Europe and rest of world.
However I don't expect Microsoft to remain idle and let this happen. Expect a sub 400$ Xbox One SKU without Kinect, in 2014. If they are really aggressive, they could hit a 300-350 price point to justify the system's inferior hardware. Things could get really interesting then.