Android tablet effective screen size, affected by 'soft buttons' and status?

Android tablets, and some phones, have their ‘soft buttons’ (menu, back, home) on the screen itself, instead of on the bezel as with most (older?) phones. Unity does not render into that space (which also contains the status icons and such.

Are the Screen.width and Screen.height taking this into account? There are cases where it might be nice to know the physical dimension of the screen, but if I can’t use it, I don’t need it. So, are Screen.width and height the usable width and height, or the total physical width and height? If the latter is there any way to get just the usable dimensions?

I’ve tested this on multiple devices and Screen.height and Screen.width has always returned the usable dimensions. Although I’ve not come across a device where the width is different to the physical resolution.