If you want a 'passable' gaming system that can handle virtually any current game at reasonable settings (not the highest), you can stick with the current laptop and run your main display via HDMI 2.1 ...
It's a new year and there are a plethora of new monitors that are either out, just about to be released, or coming soon that are all packing the very latest HDMI 2.1 display connectivity. HDMI 2.1 can ...