It can be launched even without the keyboard cover, I just launched it on my Tab S7.  Yes, it gives you a Windows-like taskbar with the time and notifications at the right end, some apps appear in the taskbar (I don't see a reason for the ones showing on mine at the moment).  The full apps list is available from the left end of the taskbar, similar to the Start menu on Windows.
Is there something in particular you're curious about?  OH - with wireless DeX I can even broadcast the screen to my Samsung TV...