Spending all of my programming time these days doing HTML5 Canvas stuff (work, personal projects, writing tutorials, helping people on StackOverflow, and helping those who email me for help)
Canvas is definitely on a slow-but-steady rise in popularity - there are a lot more questions each day on SO than there were a year ago. It's kind of nice to watch it grow, in a way.
I picked "Mobile-friendly Web development" though amusingly Canvas works in strangely different ways on mobile devices/different browsers, so it's more "mobile friendly" than Flash but still not quite the friendliest thing!