We're already approaching that point. Most modern cars phone home, and my partner's CPAP machine also has a modem that reports usage info back home, including to their insurance provider.
Lots of manufacturers probably do it, but I'll name and shame anyway... it's a ResMed AirSense 10.
There are a whole bunch of issues that can occur that a patient may not be aware of because they are asleep. Generally I wish we'd all use some kind of sleep monitoring system or at least we started routine screening for sleep disorders
The benefit of this is that I don't have to rely only on the therapist, I can also read the card myself with tools like OSCAR: https://www.sleepfiles.com/OSCAR/
I would really hate having one that reports via 4G to the therapist only.