You misunderstand. The data is not divided from the app. The apps run on the data host. In fact, if the data host is your pc, you get superb latency.

In that mode it’s a mixture of the old PC model and the new cloud model. Like the cloud but your PC becomes part of it and the browser is your window to the app running on your PC. Sounds silly at first, but it means you can get real portability.