I have one of said wristjobs.....
Happily not from my own money but as part of testing for any potential Business value for the company I work for.
My opinion:
It's something on my wrist that tells me when I need to look at the thing in my pocket that also demanded attention.....
The screen is tiny and so won't display an entire e-mail message (even with scrolling). If the message has formatting/pictures then it just won't show it at all...
It needs charged every night. It barely makes it a good part of the day (6am-9pm) if I use it to track my cycles to/from work. Oh, and it does nothing unless the phone is in range so it's not a valid option to replace my Garmin....
It's very laggy and unresponsive. Multiple taps for response or multiple glances to "wake" it up to see the clock face.
When I chose to put my phone away on coming home from work the watch happily stays connected from basement to upper floor...therefore I can't escape the dang thing tapping me telling me something is going on (stand up, you got mail!, your village has been attacked!....aarrgghhh). Think I'll go back to my regular watch that last needed a battery top up 3 years ago...
Maybe Watch OS 2.0 will make it a better experience with better stand-along capabilities (wifi etc) but I'm predicting a new watch model soon that'll have a GPS sensor to properly compete in the wearables market....