I'm not sure if this is on the roadmap or not, but it would be nice to have a more uniform development experience between mobile and the web. I'd like to be able to use realm on all platforms - with realm for react native it should even be possible to share a lot of code between them.

Obviously the realm c++ database engine can't be used on the web, but as long as there's a compatible interface over indexeddb it would allow reuse of existing code and skills and make cross platform development easier. Performance won't be as good, but that's not the point. It will still be tolerable for many uses.