Hello there. Like many of you, I just recently got the 4.4 update and loving it. I also downloaded the Google Experience Launcher so I could get the "OK Google" feature and the transparent top and bottom bars. However, while the home screen has the transparent bars, the lock screen does not. It's the usual black bars as before. Unfortunately, when you unlock the phone, it does not go away in a pretty fashion (like a subtle fade). Is it the same way for Nexus 5? I'm guessing it's just a Nexus 4 issue since GE was not made specifically for our phone.