So with the information we had should the PS4 be up or down this year? We know the Switch will be up well over last year. XB1 should will be down or maybe very close to flat I think. But the PS4 is the one I am not sure about.
PS4 is hard to predict because its numbers only had one constraint: stock.
So if it had the stock to be up it would be up. If it didn't then it wouldn't.
Complicating this is the fact that the stock that it did have sold out so quick we don't know if it disappeared because the demand was that damn high or if it sold like that because Sony didn't supply enough.