From the release notes:
Please let us know how it installs and performs if you give it a try. Thanks!All platforms
General
Improved user interface
Redesigned main window for consistency and usability; overall flow is top to bottom, left to right
Added new preset controls directly in main workflow
Added new summary tab for overview of settings at a glance
Updated interface icons to support high resolution displays
New and improved official presets
Added new presets for Vimeo and YouTube
Added new 2160p/4K device presets for Apple TV, Chromecast, Fire TV, and Roku
Added new Production presets for post-production video editing workflows
Added additional 2160p/4K Matroska presets
Improved AppleTV 4K support
Improved Intel QuickSync Video support
Added Linux support (experimental)
Added 10-bit H.265/HEVC encoding support for Kaby Lake and newer CPUs
Added support for multiple GPUs via D3D11 encode path
Many bug fixes and improvements
Video
Added new Unsharp and kernel-based Laplacian LapSharp sharpening filters
Added CSM prefilter option to NLMeans filter
Added support for mobile device orientation via auto-rotation container flag
x265 10- and 12-bit encoders are now included by default; additional dll files are no longer required
Command line interface
Added support for adaptive streaming (SPS and PPS before IDR frames) via the --inline-parameter-sets parameter
Added --json parameter to output scan/status information in JSON format, useful for scripting
Audio sample rate parameter --arate now accepts "auto" as a valid value
Linux
Added option to configure low disk space warning level
Added Intel QuickSync Video encoder (experimental, requires specific Intel driver)
Added support for Ubuntu 18.04 and 17.10; Ubuntu 15.04 support is removed
Many other bug fixes and improvements