I just remembered that if they're doing SLAM directly in the controllers, that means the headset is now free to do hand tracking. Meaning, we can get hand tracking and controller tracking at the same time. Third-parties just need to make a strap accessory and this can be like Index controllers, but better. Or you could use a controller in one hand for locomotion, hand tracking for the other hand to do other stuff, and then have the controller in a holster or gun stock when you need to pick up a gun to use. 

>>379288490
It's probably going to be good enough to not bother with a counterweight I think, if they moved the battery into the strap.