I've never understood why "I can't see a use for this in my own life" is relevant to whether there is a market for something.

If they release it, I guarantee someone will have thought long and hard over the profitability, there will have been exhaustive market projections, they may even have a long-term strategy with products no-one even knows about yet that dovetails in.

Apple play the long game, they don't release things on a whim.