The "april" timeframe is based upon past version releases. They've always released new versions some time during april
I've got a NUC6i5SYK and after enabling SGX in the BIOS and installing the driver the CyberLink Ultra HD Blu-ray Driver is happy with the exception of the HDCP 2.2 and Advanced Protected Audio/Video Path. Not surprising as it only has an HDMI 1.4 connection, but I'm trying different MiniDP to HDMI2.0 calbes/adapters as the NUC has a DP 1.2 port....but I've had to order these in as the cables I could get locally on the weekend all seem to be HDMI1.4 at best. I've also ordered the USB Pio Ultra HD Drive from Amazon JP (1-3 weeks till it ships).