IMO MS will wait and see what NX is and how well it does. If NX ends up eating Xb one sales I think MS will hit the refresh button quite soon. If NX doesn't affect Xb one sales I think MS will release the Xb one 2 roughly according to what they would have planned before the 8th gen started.
If NX eats Xb one sales it probably means it will eat PS4 sales, and while Sony can stand to lose a bit of market share to NX I think Sony would move up its release schedule a bit as well, though they will probably be the last to launch a 9th gen console.
I think MS is pivoting back to its core business (PC / Windows) and it sees Xbox as an adjunct. Therefore it doesn;t need Xbox to be a winner so long as it does well enough to help keep Windows dominant in PC.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
