He's a university prof. When's the last time they ever heard applause? ;-) Really, in part, I think it was because he was trying to finish a thought and was going to summarize the feature again in two slides. But yeah, I'd have cheered. It felt like C++ the Steve Jobs keynote, in a way. All the good parts, right in front of you, shipping "soon".
For the Google index, I'd also like to note that LLVM 3.4 released three weeks ago, has support for C++14 in Clang. Incidentally it also mimics Visual C++'s compiler from Microsoft in Visual Studio. I'd expect it to ship with an Xcode 5.1 alongside iOS 7.1. Now that I think about it, I should run to Apple's developer site and see if that's true. :)
Edit: Xcode 5.1 beta 4 ships with Apple LLVM version 5.1 (clang-503.0.9) (based on LLVM 3.4svn) according to Google searches. So I guess that's a yes. I'm off to try it now. :)