Apple Watch will be actually also good for Android counterparts. This is probably the first gadget that will actually boost the whole ecosystem (all wearables) and create more commercial opportunities across different OS platforms.
Appium is fully based on Selenium and all commands are derived from Selenium codebase. Appium is only for mobile so if you think of testing any mobile web stuff here is a great framework for that. Another great article about this can be found here: