You can buy a fingertip pulse oximeter for like $10. I understand the benefits of having all of these biometric readers directly on your personal device, but the perceived stress over getting this back into the watch seems... I don't know, not wise? In poor taste? Something, but I can't articulate it well.

I mean, we don't have IR blasters on any of our personal devices anymore, and arguably it would be nice to be able to control my TV with my phone like I could with my Palm Pilot forever ago, but that's not in vogue anymore.