A Moon+ Reader Pro update has just been released, supporting KitKat's "immersive mode"...

I can't wait!
However, Android 4.4 still is
not available in the standard fashion (OTA update) for me (2013 Nexus 7, WiFi-only). It's Day 17 now, following Nexus 5's release on November 1st. The OTA update was supposed to be available since last Tuesday when it started rolling out according to Google, but I hear very few users have been able to get it so far.
I must say, even though iOS 7 is awful compared to the most recent Android releases, Apple manages the distribution of their OS updates a
lot better than Google. A new iOS version is practically always available on day
one for everyone around the world. Whereas we've now been waiting for almost 3 weeks for KitKat to arrive...