The headlining new feature is HDR Merge
You no longer have to use Photoshop or 3rd party software to create HDR Images. It’s can now be handles and is built right into Lightroom. I use personally use HDR Efex Pro. I haven’t tried this new feature yet but it looks promising in the video.
HDR Merge: Create natural-looking or surreal images from extremely high-contrast scenes. Using HDR merge, you can easily combine multiple shots taken with different exposure settings into a single high dynamic range image.
