I don't know, my note4 does like to slowdown in places I don't want to. While it's usable, it's definitely showing its age.
Don't expect note 8 to be better spec wise, it might get 6gb ram and maybe better camera (is this really needed though? It's amazing already and if you're serious about photography get proper camera). sd835/exy8895 is what will power it, there is no doubt about it unless they delay it massively and release in Q1-Q2 2018 instead in which case it could get a new chip. No other phone coming this year will have better SoC than s8.
The s8 will last a while until we get proper next upgrades in 2019+.
Don't expect note 8 to be better spec wise, it might get 6gb ram and maybe better camera (is this really needed though? It's amazing already and if you're serious about photography get proper camera). sd835/exy8895 is what will power it, there is no doubt about it unless they delay it massively and release in Q1-Q2 2018 instead in which case it could get a new chip. No other phone coming this year will have better SoC than s8.
The s8 will last a while until we get proper next upgrades in 2019+.