Why settle for a simple concept watch, when you can have a pretty similar looking one for realsies? My only concern with these fancy new Android Wear watches is battery life. As it is, it's kind of annoying to have to charge my watch every 5-7 days or so. Having to charge my watch, say, every day? I think I would find that somewhat annoying (especially since I use my Pebble as a sleep tracker).
I have a Pebble, and I love it. One of my favourite things about the Pebble is that there's a HUGE development community building apps for it. I'm sure the iWatch is going to be well supported, obviously, but I'm curious how Android Wear will pan out. It seems like it'll suffer from the same fate that Android currently does - having to support multiple platforms, and multiple screen resolutions (and now shapes!). But it's an interesting time, and it's so rare these days to see a new (well, new to mass market consumers) product category take off. The last one would probably be the tablet market, with the iPad launch.