Had to do a double take there…
Not necessarily! A lot of office needs boil down to the Office 365 suite, Adobe and the SAP GUI - all of which now have native M1 variants. The only thing that's needed is someone other than Apple and Qualcomm actually putting out a desktop-worthy ARM CPU so that Microsoft can provide Windows-on-ARM for everyone (there are rumors of a secret deal between MS/QC that is bound to expire soon-ish). Once the price point gets low enough for corporate beancounters to buy a ton of ARM Windows devices for paper pushers, they will do so - and by that point, Intel is doomed. AMD is eating their lunch in the server market, and Intel doesn't have anything that can compete with ARM on power-per-watt and price.
On the extreme low end it's not only about Windows. Chromebooks are a thing. Eventually M1 chromebooks and Apple leveraging the fact that now they're a CPU designer? After they do some more upgrades to their own tech for their own purposes?
Then there are the applications not available on mac...Project, Power BI...
I know because amongst my estate is an rdp server for mac users to use some niche excel features and to use PowerBI desktop.
Whilst I acknowledge that the M1 macs are pretty good, Intel power pcs on everyone else's desks that work just fine for the standard Microsoft Office workload. Intel are not miles behind, they are just not ahead. In the world of Enterprise Applications x86s compatibility with legacy code is going to be important to many large organisations.
Meanwhile Apple with probably pull support for Rosetta2 in a couple of years (like last time), but Photoshop and Logic will keep working and the most users won't care.
So whilst Intel have not innovated at the speed us techies would have liked, x86 is here to stay in the non-apple world.