While I look forward to a faster desktop and mobile browsing experience with HTTP/2 I do worry about the complexity. I hope that the simpler protocols remain supported for a long time to enable implementations on low resource embedded systems.

The last thing we need is for all the closed-source, internet-connected, black boxes in our lives to poorly implement a complicated web standard protocol. There are so many places where we have already seen vulnerabilities with implementations of simple web severs and clients.