A web developer can create a package for a website that is deployed to the store. Each time a user opens this app it's loading the content from your web server

A web developer can create a package for a website that is deployed to the store. Each time a user opens this app it's loading the content from your web server - so different from a native / html wrapper. Furthermore your JS on your live site, when the site is run from this app, can do something like: if (Windows) { ...call native APIs... }. This likely also means you can use iOS objective C or the android API for apps on the display since they are all supported on Win10 now.