Once authorising a device I have noticed you cannot un-authorise them, which is slightly frustrating when using other peoples devices to check my work browser I've found they can now see my screen anytime they want and just reconnect after I've disconnected them.
basically if you're using your own devices then great but there seems to be some privacy issues here :-S
Hopefully it's just something so easy like a tiny button somewhere that I haven't seen yet :-)