I think it's stupid when people claim a console is dying. Let's go back to when the 360 and PS3 came out. 360 sold way more units then PS3, reason being the console price tag of $600, but it didn't die. Its just like Xbox is now being the underdog and PS4 is top, but just like PS3 I'm sure Xbone will come back.
Xbox and Playstation will die out when a new company comes in, like what happened with Nintendo and Sega, though Nintendo still fights on, barely, personally I play on an xbox, as the original xbox was my first console, so I go by what I'm used to. The point is, these brands will disappear, and fall to a new console war between two new brands and a universe of people who are extremely dense and can't accept other peoples choices, ah the ridiculous world we live in ;)