I was a naysayer about smartphones/iPhones -- why would I want all these things globbed into one thing instead of my beautiful modular setup now?

Here, too, I thought -- it's an Android tablet bolted to an exercise bike.

Not saying that either the Peloton or the iPhone were epoch-shattering brilliances. Just noting that, as you suggest, sometimes putting together things that used to be separate is, well, a good and useful thing.