Though I love a spacious home, I think there is much to be said for having to share space with other people, especially siblings. It teaches one to get along, to cope with other people's differences on a daily basis, to socialize and it can help one avoid a life of excess~in material goods, in their thinking, and in how they view their own entitlement.
I think kids nowadays have too much personal space and it isolates them from many things that are good about being a family~things that would help train them for the real world and fulfill a basic need for human socialization. Could be why they are always on an electronic gadget, just trying to connect with someone...I think they are just lonely for human contact and they'll never get it in that little square they hold in their hands.