My comment about the cut of GP is just an add-on, a minor point. The main point was in what preceded that -- that it would kill the Xbox hardware business. Not a smart move.
If you're saying that any approach to Sony is many years away, I agree with that.
Obviously we don't know how this will work but If they have game pass on Switch and it has their games day 1 you have already hurt Xbox consoles. Nintendo becomes an even more legitimate alternative. I wouldn't buy an Xbox if that happened. So once you have started in that direction you have to believe they are willing to put it on every platform they can.
I think any real discussion is years off and that is because Sony is not going to be serious about it. There is reason for them to be hesitant. If Microsoft is willing to do it in the future they are probably willing to do it now.