These blog posts that I bookmarked last night turned out to address the “Flash is dying” issue. Actually looks more like it may have some serious competition. I originally bookmarked them to read because of the device-agnostic mobile testing.
Jason Griffey, librarian Top Tech Trends ALA Midwinter 2010
Gizmodo (long, and has some examples of html5)
Stan Bogdanov, instructional multimedia specialist in a library The Demise of the Native App