As a heartbeat monitor, great. The rest of it? Everything an Apple geek will gladly shell out lots of money for.
I’ll stick with my basic 4 year old slider cell phone.
Did you watch the live presentation? Apple iWatch will talk to credit card readers so you don't have to touch your credit card for purchaces, either at cash register or online, major banks and credit card companies already on board. It will also work with bluetooth devices like door locks, thermostats and room light switches.
Around the corner, Apple iWatch will work with bluetooth-based vehicle idiot lights and other dashboard indicators.
iWatch is actually a wrist front-end for the iPhone, supporting models from iPhone 5 I believe.
I will put you down as a maybe purchaser. As an Apple Fanboy I have absolutely no use for one. In fact I have no real use for any Apple Products beyond a web browser and I don't even use Safari. My computer runs 24/7 hooked to my Big Screen TV, and has been for 5 years or so without a crash of any kind other than an external drive or two. That is why I use Apple Computers, I even have a couple Mac Mini G4 models that are still running.