There are some headsets (such as Audeze Penrose) that use 2,4GHz wireless instead of Bluetooth. Penrose's latency is reported to be 16ms. At least for games, that's good enough and noticeably better than anything over BT I've tested.
Of course, it has the dongle issue which limits the usage to certain devices (Xbox and Windows in my case, I haven't tested the dongle on my Mac or Linux).
Of course, it has the dongle issue which limits the usage to certain devices (Xbox and Windows in my case, I haven't tested the dongle on my Mac or Linux).