Have never been really integral or necessary to them, nor is ps4 integral to sony even tough it's pretty important. Just Ninty have gaming as integral to the company in terms of platforms owner.
Now about spin-off is possible but not likely, x1 isn't doomed or a big enough liability for them to dispatch it.

duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
http://gamrconnect.vgchartz.com/post.php?id=8808363
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
http://gamrconnect.vgchartz.com/post.php?id=9008994
Azzanation: "PS5 wouldn't sold out at launch without scalpers."







