The demo was made by a small team of developers with some part-time help from others. It is built with Unity 5.4 beta (available as an open beta). The image used are open source (https://bitbucket.org/Unity-Technologies/cinematic-image-) and some new real-time area light tech currently in R&D was also used (this will be presented as a technical paper at Siggraph 2016).
Part 2 of the demo was just shown at Unite Amsterdam and should be on youtube shortly. The team will publish the demo on the Unity asset store soon.
All Unity’s features are in the free Personal Edition.