Nab2016 BlackMagic Design introduces the new Video Assist 4K Video / Audio Recorder + 7" HD Display. Not only cheaper than some of the Atomos 4K recording products, but you can also record 4K video via SDI (as where Atomos is only HDMI).

1920 x 1080 Touchscreen LCD
Records UHD 4K/HD Up to 30 fps
10-Bit, 4:2:2 ProRes or DNxHD
HDMI and 6G-SDI Video Inputs
Dual SD Media Card Slots Supports UHS-II
Two Mini XLR Inputs with Phantom Power
On-Screen Histogram and Audio Levels
Focus Peaking & Zebra
Dual LP-E6 Hot-Swappable Battery Slots
AC Adapter Included

It's not often Blackmagic Design introduces a new product at an NABShow and has it available shortly afterwards, but the new Video Assist 4K Video Recorder Monitor is available right now (via B&H).

BlackMagic Design Video Assist 4K Video Monitor Recorder