>>376393374
That's true for the in-air gestural stuff, but not because it's inherently clunky or useless, it's just impractical for long-term usage. It's tiring. The reason it's often clunky and useless is simply because of tracking and hand jitter that the dev didn't compensate for (which is possible depending on the interaction), so without force feedback, you can't do precision control in those apps. 

But the impracticality is insurmountable. It's already tiring enough on a normal PC when a program was designed so you have to constantly switch your right hand between your keyboard and mouse. Even if you did introduce more physical input devices, it wouldn't serve a great benefit to your workflow unless it was a complete mouse and/or keyboard replacement, otherwise M+KB wouldn't be the sole input devices most of us use for PCs today. 

However, given that touch pads can be somewhat useful in some situations, individual app developers may, in the future, given the assumption that a user is in VR, design their app so that when it detects a user is in VR, it'll spawn some stuff to make your table act like a touch screen. There will likely not be universal augmented input schemes made by an OS provider since they know or will figure out that M+KB is still just everything we need for now for most computing needs. So those additional inputs will have to be tailor-made by specific app developers for their specialized needs. In that sense, what this video shows isn't THAT unrealistic, outside of the hovering controls. 

Complete M/KB replacement input schemes may come in the future though if they do eye tracking and BCI right.