Failed.
I admit I was too optimist in this prediction.
Xbone needs more than be only $50 cheaper... it needs either to be $100 cheaper ($200 price drop from original price) or have two or three games package being $50 cheaper.
I guessed the Xbox brand was strong enough to hold sales with PS4 being only $50 cheaper... the really surprised me because even $50 cheaper in US ($150 price cut) it can't catch PS4 in sales at original price yet.
Another prediction failed :(