Presentation slides is the one remaining productivity tool that seems stuck in the 90s. Even more recent solutions seem to just attempt to replicate the old slide experience without much to add to it beyond cloud storage and maybe some comment features.
Tome takes far better advantage of an online, all digital canvas to expand the possibilities of what you can express and how well. It also does a great job of getting the formatting minutiae out of the way so you can focus on the ideas you want to communicate.