See Placemark's public roadmap. This isn't exhaustive - we're shipping new features on a regular basis.
- Share maps with linkable URLs
- XYZ support for map backgrounds (video)
- SSO login for enterprise plans
- Join data against CSV files (announcement)
As a collaboration-focused, web-based mapping tool, Placemark has limitations relative to some traditional, desktop or command-line focused tools. We're constantly working on making Placemark more efficient and able to handle larger datasets faster. File imports are limited to 10MB per map.