"HTTP/2 specifications have been approved for publication, according to the Internet Engineering Task Force (IETF). 15 years after the launch of HTTP/1.1, IETF have gone through over 200 design issues, 17 drafts, and 30 implementations to get the specification approved to be published as standards-track RFCs."
Compared to HTTP/1.1 the key differences include
- HTTP/2 is binary, rather than textual
- Instead of being ordered and blocking, HTTP/2 is fully multiplexed -- using just one connection for parallelism
- using header compression, HTTP/2 reduces overhead
- HTTP/2 allows servers to “push” responses proactively into client caches