Available at vimeo.com in HD, both streaming and as a DRM-Free download!
I didn't realize Vimeo offered video on demand and paid DRM-Free downloads, this is such a wonderful revelation as I had been interested in buying the limited Blu-Ray release but had been a couple weeks too late to make the reservation cutoff.
In case anyone here is interested:
https://vimeo.com/ondemand/itssuchabeautifulday/60784253