I think the purpose of this card is less to allow for an upgrade to 4k (the boost in speed for raster stuff is pretty trivial), but rather to enable the switch

I think the purpose of this card is less to allow for an upgrade to 4k (the boost in speed for raster stuff is pretty trivial), but rather to enable the switch to ray tracing as a rendering tech. So you should see a visual improvement in your gaming at the same resolution/hz, rather than an increase in res/hz.