would I get a noticeable or impacting difference between this display and my 1070 with 7700K vs 5900X with 3080?
of course. what would be the point of putting out newer, more powerful hardware if it offered no boost in performance?
that comparison would be
at the very least double the performance with even more features enabled.
you really should go do research regarding manufacturer's chipsets, GPU engines, screen\panel technologies, refresh rates\resolutions\response timing, technology upgrades in the PC market, computer gaming in general, before you get much further into purchasing your new components.
it really seems like you have no clue what you are actually trying to achieve and how to actually go about accomplishing it.
when you actually know exactly what you are looking for, it makes it a lot easier to find better options for better prices without risking as much buyer's remorse for purchasing components that end up not accomplishing what you were hoping for.