PowerPoint for the web, or Powerpoint Online (formerly PowerPoint Web App) is similar to the installed version, however it allows users to create presentations directly from a browser, with no need for an installation.
Anyone who needs to use Microsoft PowerPoint collaboratively with team members in different locations would do well to let PowerPoint online take care of the dirty work. If you experience issues related to version control - and who doesn't? - this is a worthwhile investment. Plus, PowerPoint online is really the gold standard. Other online software suites do things similarly, but learning curves are eliminated altogether if you are collaborating with a team member who's already familiar with PowerPoint.
I would rather change to other tool if I could. Microsoft Powerpoint Online was top-down forced without a real technical (maybe financial only) reason, and I think the product itself looks like a poor adaptation of the offline version. In my experience, it cannot be properly used in real time collaboration, can't handle large media (images/videos), has low performance even for a single user, it is a nightmare.
I have used Prezi also in my last company along with Microsoft Powerpoint Online. But I feel that Prezi has also good features like designs, frames, themes etc but this tool is really complex to use as compared to Microsoft Powerpoint Online
It has made it easier for the training to be well handled and transitioned to the work-at-home life faster.
a lot of people is used to the installed version of PowerPoint, the online version is a familiar look and feels to the times when we were working from the office, which made the transition faster and easier for everyone.