Eureka... The Battle for Bed Space is OVER ! ! !
Ford ( Yes, the car maker) has just created a bed with special sensors that sense where you are sleeping, and moves like a conveyer belt.
If someone crosses tht 50% line and comes over to your side, the whole mattress moves so the other person is back on "their side". ( Im hoping this technology works if you have a DOG on the bed too! )
Unfortunately, they only made this prototype as part of a promotion for the "lane assist" feature in their cars. Unfortunately, it doesn't seem like Ford is going to really make these beds.
Hopefully if enough people DEMAND this , it can become a real thing.