Joseann
I think there is currently something called "broken plan" living, which has evolved from open plan living. As Norah and Doodledog say, you basically break the space up into areas or zones using bookshelves or open display units. That's why IKEA is so popular.
Not exactly, I undoubtedly explained 'the kitchen' poorly.
Ours is a long space on the back side of the house - from the side entrance (not including the loo/ dog room with doors). Fireplace, cased opening, into the kitchen with islands, table/chairs, appliances etc. Next a 14 ft wide case, then the couches, tables/chairs, TV etc. Then another 14ft wide opening into children's toys, library, TV, couches, chairs etc. Fireplace.
A lovely old door opens, near fireplace, into bedrooms area.
The casements enclose wall supports and electricals - but don't provide zones or displays. I know what you are speaking of, but we have an old home, nothing fancy or modern, no IKEA - old brown wood (or painted wood).