Those are mostly available only for download and for playback after, which can take days to download due to current internet bandwidth. Moreover a sony player is required to play those and more importantly will be available only to a single 4k TV too, sony. But basing on the last PR, ultraflix has titles close to its vest from sony pictures so I can safely assume that ultraflix will have those as well soon and will become available once the 2015 sony TV debuts IMO.