I don't think Andrei's chart was implying making one prototype; but, rather
using one group of technologies for as many prototypes as you want for
specific platforms giving a broad overview of their effectiveness along with
tools and resources to do so. I think what tools and resources go with what
platform needs to be more apparent.
The graph reminds me of this: http://epsonality.com/
*no need to trample the jewels, I am fully aware of the overwhelming
un-acceptance of full on flash sites.