The one thing I use it for is lesspass (if you've heard of it then see the note at the bottom). It is a site that hashes content (site, username, password) to, somewhat problematically, generate a new password deterministicly.
I downloaded the HTML, verified they're not doing anything shady, and then put the HTML file on IPFS so that 1. I could self-host and always get it even if their site was down, but also 2. Know that they didn't update the site and suddenly start harvesting peoples master passwords.
The bigger usecase for IPFS though would be for something like Nix with people being able to share precompiled binaries through IPFS (which is in the works). IPFS more of a foundation tool, not an end-user tool.
Side note: while lesspass doesnt live up to the hype, but it can be useful... I mean useful if you don't really use it as intended.