I happen to work for a furniture store. This feature already exists in a lot of office furniture and, occasionally, in some living room furniture. You will find it more often in an end table because those are usually placed closer to a wall. You will only find it in sofas and chairs, once in a while, if the piece already contains a motorized reclining mechanism. Otherwise, it's just not a practical application to add to those pieces of furniture. Not many shoppers would pay an extra $100 to have a power outlet pre manufactured into their sofa when they can just plug their device directly into the wall, or get a cheap $6 power strip that will do the job. Also, it would not make sense to put these into a coffee table, because coffee tables are usually placed out in the middle of a room and you would have to run a cord across the floor to power the table. Furniture makers do not want to be sued for tripping hazards.