Sunchip is launching their Allwinner H3 quad-core ARM Cortex-A7 based set-top-box with 4K support, it is shipping now. Sunchip is also showing the Allwinner H8 octa-core ARM Cortex-A7 TV box, also shipping now. Sunchip can do HDMI Sticks with the H3 and H8 also.
You can contact Sunchip here:
Shenzhen Sunchip Technology Co., Ltd
Kobe Chen, Sales Manager
Mobile: +86 13751103656
Phone: +86 755 26733959