I will use VR when I can put on my headset, anywhere, and be transported to my "desk". I want to be able to take documents and move them around in VR, read them, put them on my "table", and then have apps that appear as monitors. So I can move and pull up email in front of me, "grab" an attachment, and "put" it into another email that I will compose.
And have emails look like a stack of papers that you could actually process - pick up, hold, throw in a trashcan or put in an archive folder. It'd be amazing if I could just crumple up garbage emails and throw them on the floor behind me, or light them on fire.
May still need a physical keyboard, but voice recognition could work. Or voice memos sent to people. I think we don't do that today because most people don't have a private office or headsets on. But it would be a lot more efficient in some circumstances if you could just leave a voice memo.
And "apps" become screens - so you can pull up PPT, see it, work on it, and then push it to the side. It would be virtually unlimited and scalable screen real estate purchased with just one headset. You could have different flexible workstations (e.g. one for music production with 6 screens in front of you, one for each project). Sort of like desktop environments, but actually changing the desktop so that the files you leave around and windows you have up are saved in their state until you return to it.
Writing a new book? Pull up a writing environment template that minimizes distraction. Ready to be social? News feeds? Gaming?
There is a lot of potential there...