Or you could look at it the other way around and say that this demo works for ~85% of the web already.
For the record, Chrome 16 holds the title of "Browser with the single largest piece of marketshare for vendor/version combo" with 30.5% as of Jan 2012. It works dandy in there. So yeah, it works just fine with the most common browser out there.
IE8 was released nearly three years ago. By way of reference, in that time, Chrome has shipped 18 major versions. Complaining that modern snazz demos don't work in IE8 is just ridiculous at this point.
I wouldn't and didn't say that. Just that I'd expect it to work with the most common browser out there.