Not currently available to download according to the official page:

"As of right now, Plasma Bigscreen isn't available for public use yet. This is due to not being developed for so long. The project has been revived, but it might take a while until it becomes stable and is available for public use."

That said, if this could run on top of the standard linux OS on my MiniPC (like Steam Big Picture), then I'd give it a go!