Keyboard and mouse availability ... it will be configurable. In your own home you'll be able to move from display to display as needed.

That does sound interesting, actually.

I might like to have some kind of charging pad that does it, you just take your phone out and toss it on the pad and there you are. Have it be 'automatic' only while in contact with a specific surface.

The somewhat reasonable mechanisms Bluetooth uses to control what to pair with already mitigate much of the problem.