All around the world people are moving into cities because of the lure of a better life. Whether this is a good thing for humans or not is not going to be debated here, but it has resulted in a number of innovations in living spaces, furniture and even how people live. A great example is the futon bunk which allows two people to easily share a room which can be used for sleeping and general living. Of course the biggest innovation has been stacking rooms next to, and then on top of each other, to create buildings and using elevators to move people in and out of them, but the actual living spaces inside are evolving at a much faster rate.
The days of large homes with multiple rooms, hallways, kitchens, wings, and large yards are waning even with the people who can afford them. New buildings and homes are constructed to be functional in their use of space. A bedroom does not have to be only used for sleep, but may double as a great tea room, or even be the main living room of the dorm, apartment, or home. Sofas can hide beds, and in some cases floors can fold into tables and benches. There are homes where entire rooms move up and down on hydraulic lifts transforming the space in incredibly unique ways.
Even walls are becoming mobile and multi-use. A space can have a huge variety of uses and be changed at a moment's notice, even turning the wall horizontally and converting it into a large table. Expect walls to fold out into furniture, hide appliances, and adapt to almost anything in the near future. Living spaces are evolving into well designed shells which can be easily reconfigured to suit the occupants' needs no matter what they may be. The wall futon bunk bed could be just one possible configuration which could easily fold out of the way for large parties or simply extra space.
People are also changing the way they use their living spaces as more and more professionals are able to work effectively from home. There is no need to re-adapt to a working environment from the home environment which can greatly increase productivity, though there are also more distractions which can have the opposite effect. The television had its own room for years, but now it slides out of view when not in use, or acts as a subtle piece of artwork complementing the room. It won't be long until they are incorporated into a futon bunk, bed frame, or even coffee table.