Waiting for Intel Cannon lake and Nvidia 1100? That's an...interesting...choice.
Most of the PC gamers I am aware of that are waiting for future parts are waiting for AMD's Zen CPUs (Q1 2017) and AMD's Vega GPUs (Q2 2017) because Intel is practically guaranteed to have yet another only ~5% IPC increase and Nvidia's next-gen Volta GPUs aren't launching until 2018 (they're releasing "Pascal refresh" for 2017).
Anyway, the reason I asked what your current CPU (or perhaps your previous CPU?) was because different people have different interpolation tolerances, so some people use much less intensive settings than others - in other words, what one person may deem to be "too weak", another person may deem to be "more than enough". As an example, even my Pentium G3258 (a CPU with IPC a bit worse than a G4400) @ 4.6GHz isn't enough for 1080p with SVP settings that I deem "adequate", but if I lower some settings, then it's more than fast enough even at its stock 3.2GHz.
The thing is, there becomes a point where more smoothness results in more noticeable artifacts, so even when performance is not an issue, it all comes down to balancing your tolerance for artifacts vs your tolerance for what movie buffs call the "soap opera effect".
tl;dr: Whether or not a Pentium G4400 is fast enough for 1080p all depends on what kind of settings you are used to in SVP - or have you never actually tried SVP before?