In "The incredible Volcker Disinflation" by Goodfriend and King (2005) we are presented with the NK Pricing equation
$\pi_t = E_t\pi_{t+1} + h(y_t-y_t^*)$
the author then mentions that there is no "long run trade-off" in the equation since "output is at capacity when current and expected future inflation are equal".
Can anybody elucidate the meaning of "long run trade-off" and the following sentence?