There are way too many variables, when it comes to systems and cables (regardless of description/placement), for anyone to make categorical propositions as to how much or whether your sound/presentation will benefit from their replacement.
Then: there are the aural acuity disparities that exist between people (as with any of our other senses), which many choose to deny.
It's been my experience, the better the equipment, room acoustics, component's power supply and everything else involved; the more obvious an upgrade in house wiring, cables or interconnects will appear.
The only way to tell whether any (or what) upgrades in your system's wires will prove beneficial, within your own budget constraints, is to try it yourself, in your room, with your ears.
Then: there are the aural acuity disparities that exist between people (as with any of our other senses), which many choose to deny.
It's been my experience, the better the equipment, room acoustics, component's power supply and everything else involved; the more obvious an upgrade in house wiring, cables or interconnects will appear.
The only way to tell whether any (or what) upgrades in your system's wires will prove beneficial, within your own budget constraints, is to try it yourself, in your room, with your ears.