@khufkens thank you for your valuable feedback. We explained the situation to the RICOH THETA product manager. He escalated this up to the top-level executive in charge of the THETA business group. Unfortunately, they cannot release the software required to power on the camera with the USB API at the current time.
The demo I saw used a camera with a custom firmware that extended the Media Transfer Protocol to turn on the camera. Currently the standard MTP specification supports PowerDown (0x1013), but not PowerOn. Due to requirements for quality and security control, RICOH is unable to release customized firmware.
The product manager submitted this feature request to the USB API team. At this stage, it is only a feature submission, not a commitment to implement the feature.
I believe that the product manager wants to work with developers like yourself to improve the camera and appreciates the feedback and your work on the camera.
Sorry that there is no solution to your problem at the current time.