For all the conspiracy theorists claiming that RTO is being driven by CEOs propping up the commercial real estate investments of their buddies, anecdotally I'm seeing quite a bit of companies not renewing or even breaking leases, putting most expansion plans on hold, and either leasing much smaller dedicated spaces or even just making co-working arrangements.
That is indeed a bizarre theory. No amount of kudos from golfing buddies is going to make up for the raises they could have given themselves for cutting office costs.
One thing I expect to happen is companies will install more one-person soundproofed cubbies for salespeople to make calls without disturbing the entire floor, or people to have videoconferences.
What I would love to see is now that offices are less loaded, have more individual offices where people can concentrate and work rather than open-plan layouts that were really introduced because they are space-efficient, mealy-mouthed rationalizations about collaboration notwitstanding.