Yes, this is it. Yes, you can forget the cables on your headset. Yes, you still need it in your PC. Yes, unless you use a performant router and a completely separate Wi-Fi AP, you will still have issues. Yes, 5ghz is enough if you don't have neighbours or your other APs on the same frequency and 6ghz is rather cooler than really better in those cases. Yes, it is that good. Yes, you will not understand it until you tried it...