Adobe Releases Lightroom CC 2015.6 and ACR 9.6
The one new feature in both is called "Guided Upgright" that Adobe describes:
We included Upright as a tool that helped Lightroom/Camera Raw customers easily straighten images, fix horizons, and reduce or eliminate the keystone effect in buildings. Upright works well when there are prominent vertical and horizontal lines. Not all images contain prominent lines, limiting the effectiveness of Upright.