I just did and holy baby jebus what a difference. I love it but read some people have issues with LG apps. So far it's all good here but looking for comments. Anyone?
Everything gets a little smaller and sharper. You can fit more on the screen. I'd compare it to changing your desktop from 640x480 to 1280x1024. The Google launcher now allows 5 columns. All you do is enable USB debugging and send a simple command. The default on my G4 was 640. You can set it lower but they say it screws up some LG programs. 540 seems to be the sweet spot. The only issue I've seen is the center button in the app drawer on the LG launcher looks weird. Any other launcher seems fine. The command is
adb shell wm density 540 && adb reboot
You can always go back to 640 using the same command. I'm digging it big time with the change though.