If I only have to charge it once a month or less, sure. Once every day or two is a nonstarter. I have enough trouble finding all of the plugs and keeping my phone charged.
However, to chime into the overall discussion: I don't really see myself wearing a smart watch. The last time I've worn a watch was in 4th grade. I really never liked the feeling of wearing one even when they were lightweight and since then I also never missed wearing one, so I don't think this is going to change.
If I'm willing to pulling out my phone and looking at it just to get the time, I would assume that I'm equally willing to do that for whatever other task these smart watches can fulfil.
That said: Who knows what we're going to see in the future. Maybe there will be a killer application that would make the prospect of wearing something on my wrist actually bearable, but for now, nothing I can think of would make me want to.
I have one at my workstation at home and one at work, and never have to find the cable to charge my phone. Which also mean I'll never wear out the charging socket :)