P775TM1 - GPU and/or CPU upgrade?

[Ranger Shrek]

I'm upgrading to 32gb RAM (have a stick coming in that is exact same model #).  System has done well for me since around 2008/2009, although I've gone through 4 screens!!

Based on below, what recommendations for extending this system's life.  Would like extra capability to handle some gaming and a 49" monitor better.  I've done some research on 2080 cards, and i9-9900 and seems like there is no sweet spot for doing upgrades for a few hundred vs several hundred with little bang for the buck as well as BIOS upgrades, risk, etc.  Not sure I'm hunting in the right holes.  Appreciate any good pathways in advance.  Thanks! 

Processor    Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz   3.70 GHz
Installed RAM    16.0 GB
Graphics Card    NVIDIA GeForce GTX 1070 (8 GB)