HDCP is irrelevant, you can strip it out. It will be interesting to see what happens with 4K. At the National Broadcasters conference this year the major players (Disney, Universal, 20th century fox) were asked when they would be finally releasing titles in 4K. Unanimously they said they have no plans, their money is on HDR (High Dynamic Range). Basically add a couple bits, get true blacks and much better whites. The post processing is (relatively) inexpensive compared to 4K.
Interestingly, most raw film is captured in 16-bit colour depth, so the information is there, but the displays could never get the contrast ratio required to make use it. Now with dual 3-chip DLP light engines and laser projection coming online (Dolby Cinema) they can finally make black legitimately black to the point your eye can't tell anymore. Primary motivation? Ticket sales are falling, dual IP + traditional distribution is costly and its much cheaper to distribute HDR than 4K. Only recently have they started to move to IP based work flows, its actually a fairly slow moving industry.
Most people don't realize that they've had 4K in theaters for the last 10 years or so. Its not actually new. It looks decent, but I was really hoping they would start generating 60Hz content. If not for movies, at least for sports. Traditional distribution systems are expensive to retrofit, hopefully IP based distribution will drive it and the studios change their mind based on consumer demand. Lots of 4K TV's, but very little production content today.
The challenge is the cost of indefinately storing and distributing up to 750 versions of the same movie.