Great news. PlayStation Team open a Beta Trial for PlayStation 4 System Software 4.0 and announce this news in this official site. Many players are really excited about it as if they are selected to test the beta, they will experience some of the improvements and new features of PS4 V4.0 in advance.
If you want to join this beta, you need to register to be a beta tester anytime before the start of the beta in early August.If you are selected, you will receive an email with beta instruction. During the beta, tested can discuss the new features and problem with other testers.
Source: Playstation blog