Just like barx said, I think I might need to get a Nexus phone just so I can test it on a real device as Nexus phones are always the first devices to get the new Android OS updates as they are Google devices.
Android 4.4 is designed to run fast, smooth, and responsively on a much broader range of devices than ever before — including on millions of entry-level devices around the world that have as little as 512MB RAM.
For developers, Android 4.4 helps you deliver apps that are efficient and responsive on all devices. A new API, ActivityManager.isLowRamDevice(), lets you tune your app's behavior to match the device's memory configuration. You can modify or disable large-memory features as needed, depending on the use-cases you want to support on entry-level devices.
The new features are impressive.
But it's too bad that we've had to wait for this version to get them (immersive mode, printing, screen recording, memory profiling).