"Starting Wednesday, the original Nexus 7 and Nexus 10 tablets, along with Google's Nexus 4 and Galaxy Nexus smartphones, will get the upgrades over the air, said Hugo Barra, vice president of Android product management."
Great! I've downloaed Android 4.3. There's a sample project for that.
BLE is really significant step for Android. Many healthcare/sports devices and some widgets like StickNFind can be connected to Android phone.
I wish I have time to to develop a BLE lib. However, it needs some hardware gears for testing in order to write code. I'm going the build a couple of BLE tags in a few months.
I like the ability to be able to add users. I can setup an account for my grandkids and only allow them certain apps to access.
I also like the App Ops hidden function that allows you to look at your apps permissions and block any that you don't want. But I had to download an app called Permission Manager to run App Ops. Anybody know the Intent to call App Ops?