Arcade Machine

Do you know if its possible to somehow boot directly into XMB or the games itself? 

Currently in the process of designing an Arcade machine and want to use rpcs3 for it but i want to avoid starting up the OS every time.

You can use CLI to directly boot games

Is there a way to have any sort of graphical interface or way to boot directly ini xmb for example?

No, you can boot into XMB but I fail to see why you would want to do that since you can't launch games from it

Well I want to just start up the machine and ideally use the arcade pad or controller to just pick a game and go.

Would be a bit difficult to add keyboard and mouse to am arcade machine juts for launching Windows and rpcs3