You could easily turn the clock 30 years back and ask the same question with smartphones/computers.
When a truly profound device hits the market we’ll see a very creative race to come up with all the different uses for it imho.
I think you need to look at the phrase 'truly profound' that you're using and consider what that actually means in context: the world wide Web has had a truly profound impact on human development contrasted to promote media. Colour TV, for example, hasn't (given radio, cinema, black and white TV already existing)
That’s what made smartphones exciting for a couple years, right? Not only were we buying devices that were doing the things that we expected them to, but new uses and applications for them were being delivered regularly.
When we imagine the new paradigm we’re usually constrained by the current one.
I imagine DevOps as really close to mode of operation to programming – you google stuff, write things in text files, have terminals open, etc. This type of work trades short-term memory for screen real estate – you need to see a lot of stuff at the same time (everything is one saccade away). That's why you have two monitors. One head-mounted display can simulate any number of monitors, while your desk is free to be used for physical stuff that matter. You can pack these monitors into your bag for work-from-home scenario and you don't have to do any additional setup – everything is right where you left it.
Yeah, you missed the part where I'm zoning out on reddit and checking my phone during the boring bits of video calls, didn't you? The real world isn't imaginary and I don't want my entire reality susbsumed in my employer's walled garden. Also f*k packing everything in a bag. I work from home 99% of the time. The other 1% external monitors are provided but I'm not doing any proper workstation-based work.