I hear what some of you are saying, people love using the phone, and maybe it's a better choice for most but I would rather go for a run without my phone and I'm betting a watch can and will replace the phone at some point. I really hate having it in my pocket, or even in a holster, heck I hate keys, wallets, etc, the thought that a watch could replace all of that is just awesome to me.
I would love to just throw on a pair of shorts and strap on a watch and that's IT. would LOVE it. I almost never take my phone out in the yard, on a fishing trip, boating etc, and I forget to take it with me many times.
A watch is perfect for me if it had wifi/cell bands, and I'm certain in 6 years we will have thin plastic phones that wrap around the wrist or are easy to fold up in the pocket with no chance of damage, I'll take that.
In the distant future this tech probably gets implanted, youth in the future will joke about our phones just as they currently do about corded phones. Not sure I would do that, but people will.