Say what you will about the official Twitter client, at least they're trying. The UI is still a little odd, but the beta is showing signs of improvement. For example, a recent update added support for immersive mode on KitKat devices.
Immersive mode is different that the transparent system bar interface, so don't get too excited. Immersive mode hides both the navigation and status bar for a full screen experience. The current beta includes immersive mode when you open a picture from the stream.
The beta version is 5.2, and 5.1 didn't have this as far as we know. So it's a fairly recent change. If you want to get on the beta bandwagon, you'll have to be part of the beta program.