In general, major browser and server makers are working hard on support for HTTP/2. HTTP/2 is enabled by default in most major browsers today and a not insignificant part of your daily web surfing probably happens over HTTP/2 — well, unless you use Chrome 51 or later :) — as large players like Google and Facebook support it. The protocol is backward-compatible with HTTP/1.1, and it will soon become ubiquitous when new versions of clients and servers switch it on.