Set to arrive with Operation Para Bellum next month, the incoming enhancements as well as what's planned for the future were described by Ubisoft as follows:
We have increased the resolution to 1728p on the Xbox One X, and 1440p on the PlayStation 4 Pro, while maintaining 50% render scaling (same as before). We are currently working on dynamically increasing the render scaling when performance allows it. This will allow for better render quality in low-complexity scenes, while maintaining 60 fps at all times by adjusting the render scaling dynamically.
Sadly, the dynamic render scaling feature that the developer mentioned does not have a release date attached to it just yet, but the bump in resolution that's heading to the game should give players some improved visuals to appreciate in the meantime.
Those interested in reading the full changelog can find it over here, which details the new Italian operators, the Villa map, cosmetic items, bug fixes and everything else that the massive update will carry.
Rainbow Six Siege Operation Para Bellum is slated to arrive on PC, Xbox One, and PlayStation 4 in early June, but PC players can jump in and try the update right now on the game's test client.