Here are the QUIC highlights Google wants to emphasize right now:
- High security similar to TLS.
- Fast (often 0-RTT) connectivity similar to TLS Snapstart combined with TCP Fast Open.
- Packet pacing to reduce packet loss.
- Packet error correction to reduce retransmission latency.
- UDP transport to avoid TCP head-of-line blocking.
- A connection identifier to reduce reconnections for mobile clients.
- A pluggable congestion control mechanism.
In other words, QUIC is yet another protocol that Google is building to help speed up the Web. It has already done so notably with its SPDY protocol, which is now the foundation of the upcoming HTTP 2.0 protocol.