So lately I started gaming at 4k and in almost every game I need to lower down settings and internal resolution scaling to 80% to get decent fps. As this is a bit annoying I've decided to go with either 2080 or 2080 ti for my next gpu upgrade, but I might need some help to decide 
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Is it really worth upgrading from a 1070 (EVGA FTW) to a 2080 or is it better to wait for 2080 ti prices to go down? I'm trying to justify paying half the price of another 2080 to get a 20% performance increase. Also having the same amount of vram on 2080 doesn't feel like an "proper" upgrade to me, especially when the new Radeon VII cards have 16gb.
.Is it really worth upgrading from a 1070 (EVGA FTW) to a 2080 or is it better to wait for 2080 ti prices to go down? I'm trying to justify paying half the price of another 2080 to get a 20% performance increase. Also having the same amount of vram on 2080 doesn't feel like an "proper" upgrade to me, especially when the new Radeon VII cards have 16gb.