One of the main talking points at the Google I/O was Android Wear, an there are actually two smartwatches already available, the LG G Watch and Samsung Gear Live. While these watches are very reasonably priced, you'll want to make sure your phone can work with them prior to making an investment.
Android Wear is only compatible with devices running Android 4.3 and above, so older phones may not make the cut. But to be 100% positive, go to the Android Wear compatibility site directly from your device to check.
The website will notify you if your device is compatible with a handy checkmark and a Yes! Your phone is compatible with Android Wear statement.
So, did you pass?