Here are a few suggestions:
Render Setup -> Output Size: Add 4k resolution to the drop down
Render Setup -> Files -> Render Output File: As Apple is no long supporting QuickTime for Windows, and Adobe has removed support from CC 2018 and up for QuickTime 7 era formats and codecs; it would be a great time to offer rendering a high resolution video as an mp4.
Thank you for your consideration of these feature requests!