Honestly, Carmack is a brilliant engineer and knows a lot about technology, but that isn't enough to make great games or applications. Yes, it's not Doom VR, but I think just replicating TV in VR is not a good enough value prop to warrant the economic, ergonomic, and context-switching costs of VR.
VR requires applications that can't be done on flat-screens, just as movies require content that can't be done in books and radio requires content that can't be done on MP3 downloads and TV requires content that can't be done in a movie theater.
For example, apps like Tilt Brush can't be done on a flat-screen. Yes, you can create 3D content on a flat-screen, but Tilt Brush is not just a 3D content generation tool. It's more of a 3D painting tool, a creative release rather than a productivity tool, and it's a social network of content from other people that you can explore. On a flat-screen, it just wouldn't have the same usability or impact.
There is a VR Digital Audio Workstation-like app called SoundStage that--while doesn't have the usability of Tilt Brush--does signal some interesting concepts for a potential Tilt-Brush-like DAW.
I originally didn't think Google Earth in VR was a good use of VR, but since starting to work in the language training industry, it has been a surprising source of content for us to improve language training for adults. As an app on its own, I'm not sure it makes a whole lot of sense past a basic demo, but the content and form factor are very useful if one can apply a purpose to it other than just exploration. (Though the exploration can be fun for a short time, too).
I think the use of action-oriented VR titles for exercise cannot be understated. It's pretty much the only form of exercise I have any patience for, anymore (between children, job, volunteer work, side projects, high-cost-of-living in the DC metro area, and a sports injury or two). Obesity is an epidemic. Mass adoption of VR could fix that.
As an addendum to that previous point, I also really enjoy VR meditation apps.
VR could (and in some offices, is) revolutionize teleconferencing. I've had meetings in AltSpace VR that, even 5 years ago, felt better than using Skype for remote meetings.
Right now, we have a very high cliff to get to be able to create content for VR. I think it's a very similar issue to when GUI operating systems first started to come out. If all you knew were CLIs, it was very hard to see the utility of the GUI. And when people first started adopting them, they frequently had to dump out to the CLI to do things. Less than 20 years later, the CLI was relegated to niche use. I don't think the vast majority of people could have anticipated the shear number of apps we use, the mass of files we manage, the ubiquity of computing in our lives, in the mid 1980s. But all of those systems that make that possible weren't a part of those first GUIs.