The project is the work of William Victor Camilleri and Danilo Sampaio from the Bartlett School of Architecture at the University College London.

The machine essentially reads the needs of the individual plants and moves itself to a place where the environment is more suited for growth.
Having giant autonomous plant spheres wandering around cities is obviously not beneficial to society, but this study does show promise in the field of autonomous farming. Rather than relying on human intuition, sensors will tell growers what their plants need, and perhaps how to adjust their planting in order to be more fruitful in production.

This autonomous plant sphere kind of gives plants a brain, and allows their physiology to adjust how they are positioned. One possible avenue
for this technology is plant controlled biosensors on a much smaller
level. Imagine a series of small autonomous spheres, seeded with the
plant desired to be grown, which would then seek out the best location
and environment for planting. This could revolutionize farming
throughout the world, and maximize growth in the ever-shrinking farming
environments.