Yeah, it's good. But it's one week you see, a week where the system got a load of new stock to fill some backdated demand, and where it launched in a good few new countries.
However, the true test will be in the new year. When holiday sales have disappeared for all systems, and when PS4 stock is plentiful. Then we shall see which system really has the demand. It does look like the PS4 though, In Europe at least.