It can be built as an Amazon Echo clone.

But the most important feature is that you can embed it to your product/object but with advanced voice technology, such Far-field Voice Capture, Beamforming, Acoustic Source Localization, Nosie Suppression, De-reverberation and Acoustic Echo Cancellation.

And also it contains a lot feature, such touch, Arduino compatible, expansion header pins, etc. So if you want to build a funny toy instrument, ReSpeaker should be good choice. Or embedding ReSpeaker into a robot which you can chat with.

Besides, it's easy to develop another hardware module motor driver.