The "Bed" can be a useful element for logging out of the game and if you get disconnected from the game. Let me explain.
By "resting" on a bed element that is not already claimed, you can bind yourself to that element when you log out. So no matter where that element goes (if it is on a ship) when you log back in, you spawn as resting on the bed.
Similarly, if you get disconnected, you will spawn in at the last bed that you claimed.
A "Bed" element can only be claimed by one person at a time, when a person claims a different bed, the last one he claimed is freed for someone else to claim.
That would also make bedrooms a nice feature on ships and planetary buildings, where you go to "rest" and then log off the game. Also, this would possibly make the Hotel/Motel business viable.
Another possibility is that if you log off without being in a rest state, it may leave your avatar in game and vulnerable for a period of time. When you log back in, the game tries to put you where you were, but if you were in a moving ship... you may end up in space. Trying to log off without being in a rest state could give you a warning as such.
Just an idea