I don't understand why you don't get this, final blow is obvious and it simply means pulling ahead, which the PS4 is not, so it's still contested. If the gap keeps gong 200k-500k, and growing back to near 1 million or over 1 million, and then going back to 200-500k, just an example, that's called contested.
To be honest all Sony really needs to do to reach that point is keep the PS4 at $299 and ad an alternative bundle to uncharted. I doubt the Xbox One is going to keep the price.
But that's not what's happening. Not even close.