The live scoreboard shows you what is happening on a PC server and is useful in many ways. When you view a server's details, it shows the progression of the current game and real-time updates on each player's performance.
If you have ever joined a server just to watch the round end in a loss for your team 5 seconds later, you'll love the live scoreboard on the updated server browser. With a quick glance, you can immediately see how many tickets or kills are left before the end of the round.
If you don't see the live scoreboard in your Battlelog yet, don't worry. We are rolling it out to more users every day to gather performance data and community feedback before releasing it for everyone.