There are so many new features in Lightroom 3 so I am only going to focus on the most important ones and I will also give you a link where you can find out about all the new features in Lightroom 3.
Here we go:
- Lens Correction that addresses Geometric Lens Distortion and Chromatic Aberration
- Improved Web Templates
- Additional Print Templates
- Focal Length Filtering in Metadata Filter
- Ability to Upgrade Lightroom 1 and Lightroom 2 Catalogs as well as Lightroom 2 Beta Catalogs
- Ability to move Photoshop Elements 6, 7 and 8 to Lightroom 3
- Updated Print Resolution Limits
- Direct Tethered Capture Support for Canon and Nikon SLR Cameras (very nice!)and many more.To find out about all changes read the article by Tom Hogarty.