Developers will have access to new features and APIs with today's SDK update
As part of today's announcements, Google has made available the Android 4.4 Kit Kat SDK component. Designed primarily for application developers, the SDK allows programs to be written using the newest APIs and features when targeting the devices that will run Kit Kat. Support for all of the features, like Project Svelte to help lower-spec devices, the new immersive screen mode, and host card emulation for NFC payments will be available for the great developers Android is blessed with, and we're plenty excited to see what they can do with it all.
If you're interested in checking things out for yourself, you can update your existing SDK through the normal channels and install it from scratch using the directions detailed here. Well be digging in and playing with any bundled emulator as soon as things settle down and it's available for download. Stay tuned!