Like many mathematicians, I've been using beamer for the past few years to create slides for talks. For those of you unfamiliar with beamer, here is a handy crash course.
I'm always amazed at conferences to see so many talks (many with excellent mathematics!) using this same default template. It is an alright template, but why not spice things up a bit?
I was also getting annoyed that there isn't a good way to embed video or animations into beamer presentations since they compile to pdf. I decided I needed a switch, and that I would use reveal.js for my next presentation. So far so good! It takes a few seconds to load the later slides since I've included a bunch of images and have an animation using html's canvas element that is computationally expensive, but I'm pretty pleased with the result.