The window is this year. Josh's cap hit goes from $16 million to $39 million next year. That means we will need to shed cap space in the form of letting someone go (Poyer?) or simply not extending good players coming off rookie deals. Ultimately, this will result in the Bills being more frugal and not being able to make many splashy FA moves.
The Bills will shift to a team that looks to fill holes through cost efficient late and mid round picks.
Now, it's not to say that they can't win a super bowl like this, but it's sure as ***** a hell of a lot harder. The Bills will need Josh to shift to a Brady-style below market value contract if they want to be perennial winners.