BeoSystem 4

I have a BeoVision 12 - 65 with a BeoSystem 3 video engine.  Could I expect a better picture using a BeoSystem 4 video engine?  Perhaps as good of an image as I would get with a 4K monitor?

I have a 12-65 with a Beosystem 4...don't know how it compares to a BS3, I'm certainly very happy with the picture I have.....can it be as good as a latest 4K HDR image on an OLED? I don't see how it can, but I'd be in no hurry to change- after all, 95% of the time I use HD channels or BluRay, and the quality is excellent....the audio experience may be better with the BS4 for sure vs the BS3, others will know better if the picture processing is better as well....