Questions about the PSN on PS4

[Tom3k]

STRYKIE said:

This got me wondering, if you have over 100 friends on PS4, what happens when you log in to PSN via PS3?

This is from PS blog.

The PS3 system will continue to support up to 100 friends at one time. If you build a friend list bigger than 100 on PS4, network servers will automatically filter your friend’s list when you play on a PS3 system. Additionally, you will be able to set and lock a pre-determined friends list to be used while you play on the PS3 system if you wish. Support for the ability to display all of your friends in most applications and games is planned, however, some titles will be limited to the current 100 Friends limit.