One gloomy parlour game is to take a bet on what much loved service will no longer exist in ten or twenty years. We might have rightly predicted the demise of the telegram a few decades ago; or the second postal delivery; or even (to bring it more up to date) the local video rental shop. To be honest even the first postal delivery isn't what it was (at least once a week we get someone else's mail... so where is ours going?)
One common answer to the "on the way out" question would now finger the more or less daily milk delivery (ours isn't quite daily, but near enough). How many other countries in the world (and yes I'm expecting an answer here, please) put a bottle on you doorstep most days a week?
This is where I move to PR mode.