After working for years with Grunt and Gulp, I decided it was about time to have a look at Webpack.
One thing I really like about it is how it figures things out and moves assets automatically. For example, it can moves fonts and icons from your node_modules or bower_components folders just by reading your scss file. I also find the hashing very efficient and easy to setup.
In the end, for my usage, it's not necessarly better than Gulp, just different, with pros and cons. I setup a quick template if you're interested: