Somebody found out it wasn't posted before I guess.

I hadn't seen it before so I upvoted it.

Same for a bunch of other guys I guess.

Regarding advertisements: I'm fine with them as long as they are interesting. Also, quite a lot of the stuff you see on HN is advertising, -advertising for someones consulting business, SAAS offering etc..

It is irrelevant whether they can or not.

The FDA and other health agencies have made it crystal clear that these devices are allowed to provide health guidance only and not be used for anything critical to life.

If someone bought the watch for this feature and it didn't work Apple would be in serious trouble.

It's not out yet, but I believe that it is not monitoring your heart rate continuously, because it would require the IR leds on the back to be on at all times, which would drain the battery.

If the Android watches are anything to go by, absolutely not. The heart rate monitor on my Moto360 is often out by 50% or more.

Latest claims by Tim Cook suggest that it should basically last throughout the day, and you would need to charge it over night every day, unless you don't use all of its features, in which case it could last up to 3-5 days.

I doubt even Apple knows the exact numbers.

They are likely still tuning the daylights out of the software. One of the fantastic things about the watch is that the battery life improvements will flow through to iOS and OSX.

What will be interesting for me is to see whether Apple and or the Apple Watch is going to "up the game" in regards to the whole wearable technology thing. I mean there have been and currently are many Android and other watches but they're not much better. It might take a few iterations before they really nail it. First thing is to ditch the wired-charging. I can't get over the idea of plugging a cable into my watch at night.