Yes I'm running custom... Carbon ROM.. it's customized to the tilt.. Pac man ROM as well.. Both are great bc I can run tablet mode..
4.2.2 will have different file structure for stock phones.. It is intended for multiple users.. It will allow you to place widgets on the lock screen.. You swipe left you can add more widgets.. Swipe right to the camera... Toggles will be replaced by tiles...I'm not sure how Samsung will incorporate it into N2 so might be a slight variant.. Also the custom ROMS let you add tiles.. I'm sure stock won't..
Here's an example.. Just don't mind it from the bottom bc I'm running tablet mode.. It will come from the top though..
Here's a sample.. I have HD widget on my lockscreen..