Lepton appears to be the new official name for Valve’s version of Waydroid (Android in a Linux container).
We still don’t have a whole lot of details about how this is all going to work, outside of Lepton enabling Android APKs for developers on the upcoming Steam Frame VR kit, but it’s now that little bit more official with a proper name and even a logo.
Not simple libs, an entire trust chain from boot to running app that is supposed to improve security and integrity. It also happens to have the side effect of making the entire chain dependent on Google, which I’m sure Google is totally not happy about you know.