You will very soon be able to use Microsoft's Cortana voice assistant with the Raspberry Pi 3 and make cool devices that can accept voice commands.
But for that, you'll need to upgrade the popular developer board, which can run Windows 10 IoT Core, to the Creators Update of the OS.
You'll be able to use Cortana on Raspberry Pi similar to the way it works on PCs. You'll be able to ask for weather, time, traffic, or stock prices.
Users will also able to build smart devices using Raspberry Pi 3 that will be able to accept Cortana's commands. But the devices will need to be based on Windows 10 IoT Core, not Linux-based OSes.
Customized commands can be programmed for devices and could be related to reminders, look-ups, mapping, events, news, dictionary, and other "skills."