I would be concerned about the gpu more than the cpu. The i7 8700k is a good cpu and will remain a good one for a while. Overpriced yeah probably but still a good one. The 1070 is not a great card if you plan to play at 2k144Hz or 4k. Considering the price difference between the 1070 and the 1080/Vega 64 and the lack of a clear equally priced upgrade path within the RTX lineup i must say the 1080 was a far better purchase for anyone not playing at 1080p60. I have buyer remorse about the 1070 i bought that's for sure.