The latest firmware (version 6.0142) has been released for BZ40H series.
This version is downloadable by through BRAVIA's built-in menu of BRAVIA. (Help > System software update)

Sony is launching four BZ40H series displays that are optimal for video conferencing and as digital signage.
The high resolution/high brightness/high definition displays accurately convey the colors and contrast of the content and clearly articulate intricate characters and graphs. With realistic images even during video conferences, users can experience online meetings that feel just as immersive as face-to-face meetings. Digital signage content is displayed in high resolution, allowing signage to capture more attention than ever before.

Sony has unveiled its new BRAVIA™ 4K BU40H series professional displays for the commercial market. The advantage of this series falls not only on Sony's high picture quality, but also on the intelligent, convenient professional features and flexibility to customize. Compared with the previous generation BA35G series, the BU40H series has improved its expansibility, and enhanced design with higher picture quality. This new line-up will be launched in the market from June.