Android 5.0 Lollipop is finally spreading to different devices, albeit painfully slowly, but that version of the OS is already obsolete. That’s because Android 5.0.1 is now out for a few select Nexus devices and in its AOSP form.
The newest version of Android hit the internet last night with build number LRX22C. Android 5.0.1 is currently available as Android 5.0.1_r1 in the AOSP and images are also available for a handful of devices: Nexus 7 (2013), Nexus 9, Nexus 10. You’ll obviously need to flash those to your device if you can’t wait for the official update.
As for what 5.0.1 brings, that's not very exciting. As the tiny version increase would point to this as only a bug-fixing build, aimed at squashing some of the problems found in the RTM of Lollipop.
Still, if you’re one of those folks to likes to live on the bleeding edge of technology you’ll no doubt be happy about this latest version of Android.