Last Gen Sold 280m Consoles. How much will this gen sell? Predictions

[JRPGfan]

If MS does a new consol before 2019 they are shooting themselfs in the foot.
You dont want to jump the gun on these things.

It needs to match up to either a new process node, or new tech release, or atleast be close to the competitor so you dont end up to far behinde when they come out with theirs.