In a small living room nowadays people opt to paint one wall in the room different & create a highlighter kind of effect.
Either this wall would be behind your TV unit or this could be any wall in the room. The paint used for textured wall is very special. It is water based but this one you can clean with wet cloth. Usually water based colour a (like velvet paint) you don’t let water touch it, since try are water based. Textured paint is water based but cleanable.
There are different styles through which you can give different finish to this wall. Different types rollers, tools , brushes, sometimes hand treatment is given to create this textured wall effect. These paints are called two tone paints.