The PS4 is the fastest selling home console in history, so it will do fine and be profitable.
The XB1 is very popular as well, so it will do fine and be profitable.
The Wii U is selling at all time lows as compared to any and every Nintendo home console, so that is the one to be worried about imho. I think Nintendo will come back with an 8 core competetive system soon anyway (sometime next year announcement on it unless something miraculous happens this year which all signs point to very unlikely. Unless they want to merge with them, and I don't see that happening ever but anything is possible but not always reasonable because I've never heard of a 50/50 merge it just doesn't work that way. PS4 full steam ahead m8's.