The latest beta patch for Fallout 4 has hit Steam, and it's a juicy one.
Apart from memory optimizations, improved stability, and a long list of fixes to gameplay, quests, and the workshop, you get the addition of HBAO+. HBAO+ is an NVIDIA technology said to improve the look of shadows even more than what you see with standard HBAO while being more performance friendly. It's not NVIDIA exclusive. However, the added weapon debris effects are. Lastly, there's now a status menu for settlers in your settlements.
If you want the full details, hit the source, where you can also find beta download instructions if you've never done this before.