The Apple Watch comes with swappable bands and a USB to magnetic charger cable. So, the minute it was announced third-party vendors started planning and even crowd-sourcing accessories for it. There's an official Made for Apple Watch program for bands, so we'll likely see a ton of those by the holidays, and since Apple hasn't provided a stand for the Watch, we're already seeing many third-party stands as well.
The Apple Watch can also pair directly with Bluetooth headsets, and can control the Apple TV, speakers, HomeKit and other home automation accessories, and more thanks to its connection through the iPhone. So, while you wear the Apple Watch on your wrist, you'll no doubt be using it with almost everything around you.