Bluetooth LE Audio

The features of this upcoming standard seem to resolve most of my gripes with traditional Bluetooth audio (i.e. having to choose one out of low-latency and high-quality), as well as adding totally new use cases.

It's especially refreshing to see an actual free high-quality book about it (as opposed to the common marketing brochure disguised as a book or "whitepaper", mainly designed to collect email addresses for newsletters before allowing to download it).