Realistically, the emphasis for most peeps is the "at home" - with very little of the "work" bit getting done. Yes, some can fully work from home, but not by any means a majority.
Probably not a majority no, but a very significant proportion of the working population will have proved that working from home is highly cost effective and extremely easy. Almost all office based "white collar" jobs can be carried out from home, just as they are doing right now. Technology is going to accelerate that process as developers see the way ahead especially with virtual and augmented reality.
Not everyone wants to work from home, so there will be some balance and push back, but the genie is completely out the bottle. For many workers, working from home will be completely standard clause, especially as "knowledge specialist occupations" always have to relentlessly compete for talent.
Bit of credibilty behind that...I work for a technology company that went full working from home, before the Government instruction, with zero loss of either capability or productivity. I'm dealing daily with solicitors, accoutants and all sorts of finance people, all of whom are working from home and I authored our companies' business continuity plan, so I have a little specialist knowledge in this field.