How much space do you need to WFH?
Me and DH are doing it now, we don't have an office so are using the dining room table, we've borrowed a couple of office chairs, risers, keyboard & mice from my workplace so the laptop screens are higher up.
Yes bigger monitors would be nice but we're not in the kind of roles that require CAD etc so can work fine on laptop screens. I have a visual impairment so use the win 10 accessibility features like magnifier where needed.
If we didn't have a table then we could have got the wall mounted pull down space saver desks or a secretary desk for the bedroom or living room.
Long term I do think that companies who can will encourage more WFH, it makes good commercial sense, it is significantly cheaper to provide every staff member with a laptop, monitor etc than to to pay for expensive real estate. In my are a very average city centre office space is around £20 per sq foot in rent, plus rates, electric.... plus initial fit out of at least £20,000 for a basic space and the requirement to spend it again when you leave to get the space back to how it started.
Risk assessments, DSEs and such can be done remotely via self serve assessment. IT support can be done via Remote Desktop 90% of the time and where there are hardware issues IT teams will courier a replacement temp machine to you, collect yours, fix it then courier it back and take away the temp machine at the same time.
There will always be some office based roles and the need for some communal/meeting/function room spaces, but I do think there will be a long term increase in WFH globally.