Prepare for Catchphrase, "HTML5 it!"

Long and painful is the road of overcoming buzzwords and catchphrases in the interactive space. I've had to isolate the specific qualities that result in a "Web 2.0" solution. I've had to "make social" experiences from inanimate technologies. Yes, I can smell new jargon five months out. And thanks to Apple, Google, and Adobe, soon I'll be reading request-for-proposals that require me to take a new experience and "HTML5 it." 

So what is HTML5? I won't break it down beyond stating that...