Zoom has successfully made video conferencing easy(ish) and it has proven reliable under massively increased load so I suspect it will be here to stay. Most large companies are looking to permanently increase homeworking for suitable roles. Even if many or most people will not be at home full time, they will need to communicate with people who are at home. E.g. If I'm in the office 3 days i week i will still need to talk to people who might be at home on those 3 days.
So the number of meetings might drop, but I don't think many large companies will get rid of video conferencing tools once the pandemic is over. Looking at the competition,we used cisco webex for years but that was comparatively hard to use with a desktop app that crashed all the time and it would die in a heap if you tried to use video. Then when the pandemic hit it completely died as it obviously couldn't scale! We have google meet, which is much easier to use even than zoom but has pants video quality and limited features. Not tried teams, but zoom is certainly well placed against those two services.