I bought a S3 when they first came out. Bit of an experiment, really.
In the greater scheme of things, its 'nice' to have the quick glance / physical notifications of weather, calendar, email and texts, and that's ditto pretty much everything else I have tried at one time or another on it.
But...
I mean, I see its value if you are hardcore physical fitness type, or, conversely, if your doctor recommended it for you to monitor / watch for issues - but otherwise, really, its a bit of 'want vs need' device in all honesty, isn't it? All a bit of a Dick Tracy gimmick, with a product life / OS support expectancy of maybe 5 years.
And, for all the cost of it, its not a piece of personal jewellery you're going to hand down in a inheritance or someone will find of value long after you're gone. It'll be a odd tech curiosity - like a RIM pager or Palm Pilot.
I expect this will be my first and only. Will likely look at a quality 'real' watch next time around. Or maybe just a $12 drugstore special. The rest I'll leave to devices better capable.