Which is better and why? RaphaelJS or HTML5 Canvas?

I found a vector library on the Internet that even works with IE6!

http://raphaeljs.com/index.html

It's amazing.

Now my question is it better than the upcoming HTML5 <canvas>? The only reason I ask is that it could be years before Microsoft implements a <canvas> that doesn't require a plugin for it to run.

And it will be even longer until all the IE users on the Internet get rid of their old browsers so that we can even justify using the HTML5 <canvas>.

I'm all about sticking to standards, but this one is just going to take too long, thanks to MS's slow development of their browser.

Thoughts?