Appropriately for St. Patrick's day (March 17, rainbow story)
the dream of all connected web (clouds) by services (rainbow)
will allow for composing of data and graphic on web and in web apps...
While many are chasing "a pot of gold at the rainbow (proprietary) end",
it is all about a "journey", a never ending, ever improving
connected and open web.
"Cat In The Hat" has a nice explanation about "Chasing Rainbows"
Eventually, web documents will include simple references on data and visual elements, such as "rainbow", "cloud", as well as videos, to easily create new information.
SVG already supports referencing external files, but most browsers do not have this implemented yet...