A web app cant take advantage of native desktop UI patterns (file dialogues, tray, system menus) and APIs (native file handling, win32 access, sockets, etc etc) like electron. Electron apps are desktop apps.

People have been embedding webuis in crap forever and this is nothing new, except that chrome is a way better target to do so instead of old unupdated things like Qt webview and the like. See for example, steam which is just a web browser with some native ui around it.