I think the very long-term goal is for it to be the universal virtual machine, for all front-ends and all back-ends, and for all popular programming languages. And given that its status on the browser has already been secured, I don’t think it’s impossible for the long-term vision to be reached, eventually.
From a practical standpoint I’m really not qualified recommend one over the other, but the licensing is different. Podman also seems to be more “open source-y,” but I’m going on vibes here; perhaps someone more knowledgeable can elucidate.