In UK and Europe broadly, every company is reviewing the situation and following whats best for their employees and clients. Its still largely work from home till Mar '21 at least. People are travelling only for critical business meetings- this requires approvals and safety precautions. I have heard of tech companies and start-ups opening offices with a rota system i.e. not everyone is in the office everyday. I personally don't think people will end up working from home 100% but also I don't think we will go back to pre-COVID model either. It will be somewhere in the middle but right now no one knows i.e no one knows when the pandemic will end :).
With the vaccine news in last couple of days, things can change dramatically early in the new year. But its unclear now.
I am totally with you to pounce on this and make changes in ways of working in a way thats kinder for humans and the environment. But the reality is complex- for starters very few companies (Google, Cisco, Salesforce etc) may have a clearer workforce strategy and organisational buy in to execute and follow it. Secondly, we are social creatures and remote working is abnormal. There are many other factors at play as you can imagine which makes the reality very hard. Most if not all companies are looking at this angle with urgency and trying to set some guidelines.
But individually we all must strive to do more with less. The damage caused by us to the planet is already at critical levels. So every little lifestyle change on a personal level will matter. And with enough critical mass, corporates have to change as well.