Yeah, I have never seen it before, but I saw it yesterday, and it is easily the best talk on programming languages, and programming, I have ever seen.
I have posted it to /r/cpp and interestingly some mode removed it as C++ was only "briefly mentioned".
To me, it feels quite obvious that "modern C++" has taken a note from that talk, and its efforts seem to be towards what Steel describe there, as a big language that lets people the possibility to extend the language and look relatively the same as the native syntax via its new meta programming facilities. That talk also answers many complaints about C++ heard today of being large, hard, write-only etc.
Also, in the historical context, I think it is quite a peak towards Gosling & Co, and Java, which at the time was heavily marketed not seldom by shunning of some of the C++ features, notably operator overloading and multiple inheritance.
