Maybe I just haven't been exposed to it, but in my opinion I have pretty good speeds (100 down / 50 up) and still experience stuttering on both ends. I've tried enterprise solutions (like WebEx) at a Fortune 50 with a >1Tbps fiber connection and still encountered problems. I think the problem is just that...video conferencing is a hard problem, and there is more innovation that needs to be done until we can feel comfortable replacing physical interactions with it.

One exciting prospect is the advent of AR/VR, where instead of streaming 30 1080x720 frames a second, we can stream 60 virtual character positions a second (a la multiplayer FPSs like CS:GO) that operate as stand ins for real bodies / faces. I think games such as VRChat will have a real impact on the enterprise teleconferencing space once the proper market is targeted: replace the childish characters with more "indifferent" avatars, add in some "business casual" background environments, etc.