It'll still be fake UHD. No HDMI 2 standards out there yet. Buyers will be disappointed if they expect full future compatibility.
4k is working now through direct Ethernet connection to a smart TV from Netflix and now Amazon Prime. STBs have to wait for HDMI 2 standards to be finalized. Some TVs like Samsungs are designed to be upgraded to the future HDMI 2 input. DirecTV's new service is a clumsy workaround that requires content to be downloaded to a Genie and then sent via the network to an RVU TV. Netflix 4k takes about 5-10 seconds to start and streams flawlessly with 25 mbps DSL to my Samsung 4k. The TV has to receive the stream. A box like a Roku is a dead end because the stream would have to go through HDMI to the TV.
Content is coming, new TV series and movies are being recorded in 4k.