The 2.3 update includes a few new features for the URSA, including support for 150fps recording in full HD (although it is not the full sensor, looks like around a 2X crop) and support for a brand new sensor (they're upgradeable in the URSA) that can supposedly record 4K RAW at 120fps. Here's the full list of changes in the 2.3 update:

Blackmagic URSA 2.3 Firmware Update

Blackmagic URSA

  • Adds support for windowed 1920 x 1080 recording up to 150 fps
  • Adds support for Apple ProRes 444 XQ recording in HD and 4K
  • Adds support for new V2 4K sensor for recording up to 120 fps RAW at 4K
  • New installer layout which displays current software installed in camera
  • Improved menu option for selecting recording format

Blackmagic Studio Camera 4K

  • 12G-SDI performance improvements

The most interesting part of this update is the support for the URSA V2 4K sensor. While we haven't heard anything up to this point about the sensor upgrade path for the URSA, it's safe to assume that this update means that an interesting upgrade to the camera is likely coming from Blackmagic at next week's NAB show in Vegas. Whether that's one (or more) brand new sensor options for the URSA, or something else entirely, it seems like a safe bet to say that Blackmagic will find a way to make a splash and steal the show again.

You can download the new update on Blackmagic's support page.

Source: Blackmagic Design