It allows you to operate the camera fully remotely so it is fundamentally the same thing.
To be honest, if I was going to use such a thing then having a compact palmable remote is more appealing than walking around looking like I’m holding a crucifix like the Luna option.
But it’s one more thing to carry so there is that.
The head tracker is very smart and for people doing instructional videos it is excellent - even if it does look like you are carrying ET in a papoose when you are out and about.
I guess the drawback is that it is excellent for seeing what you are seeing but falls down as a concept when doing the other 50-75% of what vloggers do which is getting their own face in reacting to what they are seeing.
One issue might be trying to be discreet as you have to look at someone and ET sat there swivelling to do the same does draw more attention and gives off a mobile surveillance unit vibe.
It such an eye catching feature though that I would expect DJI to be emulating it soon.