Soma has a clear equivalent in the form of television and social media. These are things that suck up people's attention and provide short term ego/happiness boosts so that people don't spend a lot of time really thinking about the system that they're in.

Regardless, I don't think any of these things are the "central concepts" of BNW. BNW is about how a society can oppress and degrade people in a subtle and sustainable manner, without being totalitarian, without hatred or fear or the will to dominate, with people by and large believing that they are contented and fulfilled. All this simply by the inevitable progression and continuation of certain principles, e.g. that it's good to maximise how happy people say they are, or that conflict should be avoided at any cost. This all has disturbingly close parallels with modern Western society.