This is how rich people watched Furious 7 last weekend
theverge.com
theverge.com
Under the branding this is basically the same system theaters use. Anyone can have it if they don't mind ponying up the money. Distributors have to a large extent subsidized the rollout of these systems, but charge a fee per showing to recoup the up-front investment, I think it's $250.
How long before someone breaks the DRM, gets their hands on two watermarked copies of the same film, isolates and obscures the watermark, and posts the film online? A zero-day pirated release of a major blockbuster in (presumably) gorgeous Blu-ray quality would be a big deal.