I've said it before, I'll say it again: the web needed a vector answer to jpeg, but what we got was a vector answer to html+css with all their commensurate vulnerabilities and complexities.
is PDF. Yeah, PDF has drawing commands. Most vector formats are based on command sequences, that map 1-1 with what you'd find in a drawing library like Cairo. EPS and PDF both work that way, which makes it even more of a typical vector format than SVG (which only does the command sequence thing with paths, AFAIK). Of course, it's not that well supported (the in-browser reader does who-knows-what to get it to render, I think it's converted to DOM elements), but it is the other major browser-supported vector format.