It does feel like it'd be great to combine VR headsets with hand gestures (gloves or rings maybe?). In the video for example, your slack window is far away. My immediate instinct was to grab that slack window closer to me.
But also, programs will have to be made with VR in mind. This is still showing browser windows and other programs as square items on a virtual screen. My existing tri-screen setup (2nd hand corporate hardware, cheaps) is really good at that, and I can use it without any claptrap on my face. I can also use it with others when they are with me.
Perhaps apps that break out of the box will be more common when VR is more widespread.
This is not a "2D apps on virtual screens" concept though. Every app can be freely moved, meaning there are no limitations to how you set up your workspace(s).
Also, I agree that there are SOME apps that will greatly benefit from making use of immersive/3D/stereo. But the significant majority of apps that you use today are great in 2D and will remain really great in 2D.
