Visual mate connectors. An interactive UI to set up virtual vision-based high-precision "fiducials" on parts/objects, and have the robot autoidentify and mate those fiducials in a predictable and robust way.
Macro, micro, wide, and tele cameras for detailed and precision work on end effectors as well as the general robot
Robust tool changer library of end effectors stored on the robot itself, autonomous tool changing and calibration, open platform for third party end effectors.
Robot self-charging; ability to place a charging station close to work stations, and the robot autonomously plugs and unplugs itself while stationed.
Robust VSLAM marker-free navigation. See-and-avoid collision prevention. Body language i.e. "slow down when see humans" to ease integration with human operators and other robots. (PUDU's BellaBots are very aggressive drivers in restaurants...)
First class support for third party secondary development i.e. developer API, Open platform (the code does not need to be open source, but there must not be forced app store, forced subscription, secure boot, allow user root access, etc)