If you have a Lumia then you likely already have a Qi wireless charger to go with. Now to add the watch. There’s a new Kickstarter for Agent. It’s a new smart watch that can charge using a Qi wireless charger but it has a 7 day battery life when connected anyway. Style is also at the heart of this and add a potential large app system with a real set of development tools. Check it out:
If you back it you can get the watch for as low as $129 (without the charger). Being that I’m still using a Lumia 900 I’m likely holding back for now but this looks like a nice project.