The drone sold at Digital Walker is called parrot rolling spider, worth 5k. The specs is kinda disappointing. At full charge it only work for 8 minutes. It has a camera pointing downward that take still shots. The camera also double as a vision to the ground to determine its height. It has an AI so that it can hover in one place. It can be controlled via android app connected via Bluetooth with max distance of 20 meters.

All in all this is more of a toy to show off, rather than any practical application.