Yes, that's something I'm hoping for after IE6 died.
So I did a search and found that IE 8 will be dead in Jan 2016. That's like another year's of life span for it.
So can you dismiss and stop supporting it already? It's a call you have to make. Here’s Proof Why You Can’t Dismiss IE8… Just Yet.
It might be hard to convince clients to drop IE 8 based on stats alone, but maybe if they see how clunky and ugly fallbacks work in IE 8, they might just change their mind.
Even bootstrap is not supporting IE 8 out of the box How can I make Bootstrap 3 compatible with IE8?.