Re: I don't see iWatch competing with conventional watches
Sure, maybe a 5" smartwatch.... face it, some devices are bounded by their own phisycal dimensions. Unless Ive redesign your wrist and forearm, there's little you can do in a small screen.
Glasses have a better chance to offer the services you are talking about in a convenient way. You can access info even if your hands are busy, and with the proper "screen" size.
For example if I'm skiing, there's no way I could use a wrist GPS or whatever...