This is a common question "Are feature walls still in?" I think people struggle with the word 'feature' because we used it so much in the 90's and naughties. We both love them here at Dwell but what we love the most is the variety of statements you can make in your home whether it be with paint & the various techniques & applications you can choose from, to wallpaper, stencils, stripes & exposed brick. So lets call it a statement wall & then the word 'feature' disappears (therefore no question of whether it's in or out!) That is soo 2015 !
What's next? Well why do you want it? What room are you looking at? What mood do you wish to create? Do you need to work around windows? What type of light is in the room - natural? artificial? What wall? What kind of finish? How will it affect the rest of the room? Mull these questions over ... take your time .... check out images on various sites such as Pinterest and Houzz to get inspiration. It's your home ... you can do what you like! (but if your selling soon then be wary ... not everyone is as adventurous as you!)
Do remember that you may want just a touch of colour, a point of difference without it being a big chunk of the room. Stencilling a section of wall is a lovely way to create an area within a room ... check out the 3rd image down :) Or leave the paint alone & use baskets to decorate ... check out the last image